Brain: 86 billion cells / 37 trillion cells x 100 = 0.2%
Heart: 37 billion cells / 37 trillion cells x 100 = 0.1%
Liver: 80 billion cells / 37 trillion cells x 100 = 0.2%
Skin: 19 billion cells / 37 trillion cells x 100 = 0.05%
Skeletal muscle: 38 billion cells / 37 trillion cells x 100 = 0.1%
What is Skeletal muscle?
Skeletal muscle is a type of voluntary muscle tissue found in animals. It is composed of elongated, multinucleated cells called muscle fibers and is attached to bones by tendons.
Skeletal muscle is responsible for the movement of bones and other structures, such as the heart and blood vessels. It is the most abundant tissue in humans and other vertebrates.
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pick two peers who chose current events or personal experiences different from yours. offer your own ideas about how having knowledge of the social sciences might affect how your peers understand the events they identified.
Answer:
Having knowledge of the social sciences can help one to understand the social, cultural, economic and political contexts in which events occur. For example, if one of your peers has chosen a current event related to economic inequality, knowledge of the social sciences can provide them with an understanding of the economic systems and policies that contribute to inequality, as well as the historical and cultural factors that shape people's perceptions of and responses to economic inequality.
If another peer has chosen a personal experience related to race relations, knowledge of the social sciences can provide them with an understanding of the historical and ongoing structural inequalities that shape race relations, as well as the cultural and psychological factors that influence people's beliefs and behaviors around race.
In summary, having knowledge of the social sciences can help one to understand the complexities and nuances of current events and personal experiences, and to see how these are shaped by larger social, cultural, economic and political forces.
give me brainiest
macconkey agar without crystal violet is a culture medium useful in the presumptive identification of: ____
A culture media helpful in the gram-negative bacteria's presumptive identification is MacConkey agar without crystal violet.
In the Gram staining method of bacterial differentiation, gram-negative bacteria are defined as those that do not maintain the crystal violet stain. [1] They are distinguished by having cell envelopes made of a peptidoglycan cell wall sandwiched between a bacterial outer membrane and an inner cytoplasmic cell membrane. Almost every environment on Earth that supports life contains gram-negative bacteria. The Escherichia coli model organism is a gram-negative bacterium, as are many pathogenic bacteria including Pseudomonas aeruginosa, Chlamydia trachomatis, and Yersinia pestis. They provide a serious medical issue since their outer membrane shields them from a variety of medications, including penicillin, detergents that would typically disrupt the inner cell membrane, and lysozyme, an antibacterial enzyme generated by mammals that is a part of the innate immune system.
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which of the following is the most complex level of organization rainforest water molecule heart circulatory system
Rain forest is the mοst complex level of organization amοng all of the followings.
Option B is correct.
Which level of an organization is the most complicated?The eleven οrgan systems that make up the human body, or the entirety of a living thing, οperate at the organismal level, which is the level of structure with the mοst complexity.
Starting with the smallest level of an organization, what is the proper order?The six general tiers οf the organization, ranked from smallest to largest, are the chemical, cellular, structural, οrgan, organ of the body, and organism levels. Chemicals are thοught to be the smallest and lowest organizational unit in a living system. Their sizes can range frοm the smallest atoms to the largest macrοmolecules.
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Complete question:Which of the following is the most complex level of organization?
A)a water mοlecule
B) a rainforest
C the circulatοry system
D) Heart
although people can acquire phobias to almost any object or situation, certain phobias (e.g., those to snakes, spiders, heights) are much more common than others. this finding can best be explained by which of the following concepts? responses biological preparedness biological preparedness spontaneous recovery spontaneous recovery stimulus discrimination stimulus discrimination stimulus generalization stimulus generalization observational learning
The finding that certain phobias in people are much more common than others can best be explained by the concept of biological preparedness.
Biological preparedness is described as the idea that people and animals are inherently inclined to form associations between certain stimuli and responses. This concept of Biological preparedness fills a huge role in learning, particularly in understanding the classical conditioning process. So in cases where people can acquire phobias to almost any object or situation, certain phobias (e.g., those to snakes, spiders, and heights) are much more common than others, it can be explained by the concept of Biological preparedness. Response generalization is an critical detail of operant conditioning. It takes place while someone can generalize a conduct found out withinside the presence of a stimulus after which generalize that reaction to another, comparable stimulus.
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A large dry area that stretches across north africa and is very difficult to live in or travel across
Answer:
Sahara Desert
Explanation:
which of the following is an enzyme that attacks cell walls of gram-positive bacteria making it inhospitable to most bacteria?
In peptidoglycan, a component of the bacterial cell wall, lysozyme breaks the connection between NAG and NAM.
What enzyme breaks down the gram-positive bacteria's cell walls? In peptidoglycan, a component of the bacterial cell wall, lysozyme breaks the connection between NAG and NAM.Gram-positive bacteria, which do not have the gram-negative bacteria's protective outer layer, are more susceptible to it.Gram-positive bacteria are lysed by the glycoside hydrolase lysozyme (15 kDa), which is expressed by the Lyz gene. It does this by hydrolyzing a glycan link of a peptidoglycan made of N-acetylglucosamine and N-acetylmuramic acid on the surface of Gram-positive bacteria.Lysozyme's antibacterial action is particularly effective against Gram-positive bacteria because of its capacity to hydrolyze the -1,4-glycosidic bond found in the polysaccharide layer of these bacteria cell walls.Biological fluids including saliva, milk, and tears include the naturally occurring enzyme lysozyme.To learn more about lysozyme refer
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Based on the cladogram, which stateme: BEST supports the claim that flowering plants are related to earlier plants?
С
A.
Flowering plants have true leaves like ferns, and they produce pollen and seeds like the ginkgos and conifers.
B.
Flowering plants have true leaves, produce pollen and seeds, and have ovules and stamen like the ginkgos and conifers.
C.
С
D.
Flowering plants produce endosperm and transport water via xylem but do not produce pollen and seeds like the ginkgos and conifers.
Flowering plants transport water through xylem, have ovules, and produce endosperm, and ginkgos and conifers have true leaves and produce pol
Cladograms are diagrams which depict the relationships between different groups of taxa called “clades
What is cladogram?
A cladogram is an evolutionary tree that diagrams the ancestral relationships among organisms. In the past, cladograms were drawn based on similarities in phenotypes or physical traits among organisms. Today, similarities in DNA sequences among organisms can also be used to draw cladograms.Examples include vertebrae, hair/fur, feathers, egg shells, four limbs. Continue listing traits until you have one trait common to all groups and enough differences between other groups to make a diagram. It's helpful to group organisms before drawing the cladogram.The three major types are: monophyletic, paraphyletic and polyphyletic. Monophyletic means one clade, paraphyletic means around one clade and polyphyletic means many clades.
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3 Which is of the following statements best describes the structure, or makeup, of a codon?
A. A codon is a 3-letter nucleotide sequence found on the tRNA.
B. A codon is a growing polypeptide chain.
C. A codon is a gene sequence found on the DNA strand.
D. A codon is a 3-letter nucleotide sequence found on the mRNA.
4.What is true regarding genes and DNA?
A Each DNA strand contains identical genes.
B The DNA only transcribes the genes that it needs at specific times.
C Both A and B
D None of the above
Answer:
3. D. A codon is a 3-letter nucleotide sequence found on the mRNA.
4. D None of the above
Explanation:
3. A codon is a sequence of three nucleotides, or bases, on messenger RNA (mRNA) that corresponds with a specific amino acid or stop signal during protein synthesis. The sequence of nucleotides on the DNA (deoxyribonucleic acid) is copied, or transcribed, into a complementary sequence of nucleotides on the mRNA. The mRNA then travels to the ribosome, where the sequence of nucleotides, or codons, is read in groups of three. Each codon corresponds with a specific amino acid or stop signal, which are brought to the ribosome by transfer RNAs (tRNAs) and linked together to form a protein.
4. D None of the above
which of the following is a threat that is particular to our fresh-water supply typical for coastal areas?
-Many technologies that are already available can help us save enough water to hedge against climate change and reduce stress on threatened natural resources while still allowing us to meet our -needs for agricultural, industrial, and residential use.
-By 2020, enough water can be saved from indoor residential uses alone to meet the needs of over 5 million people.
-Proper irrigation can save another 450 thousand-acre-feet (KAF) of water per year. This is enough to satisfy the needs of another 3.6 million people (1 acre-foot supplies two households of four people for a year).
The availability of freshwater resources and coastal habitats are under threat in these areas due to the high water demand.
What is the main threat to the world's freshwater supply?Among these dangers include pollution, the results of climate change, a rise in diseases associated with water, and the extinction of freshwater ecosystems.As a result, there will be issues with water scarcity, excessive groundwater extraction, saltwater intrusion, and wetlands damage.The five categories under which we categorise threats to freshwater biodiversity globally are overexploitation, water pollution, flow modification, habitat destruction or degradation, and invasion by exotic species.Numerous human activities pose threats to freshwater systems, such as channelization, groundwater pumping, diversion, dam construction, pollution, human-induced climate change, and overuse of natural resources (e.g., Postel & Carpenter 1997; Malmqvist & Rundle 2002).The three broadest types are physical security threats (such equipment damage from power outages), natural threats (like earthquakes), and human threats.To learn more about freshwater refer to:
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define the following terms: true breeding, hybridization, monohybrid cross, p generation, f1 generation, f2 generation
The following terms can be defined as:
True breeding: True breeding is a sort of breeding in which the parents generate kids with the same phenotype. This signifies that both parents are homozygous for all of the traits. Aberdeen Angus cattle are an example of real breeding.Hybridization: In genomics, hybridization is the process by which two complementary single-stranded DNA or RNA molecules join together to generate a double-stranded molecule. The bonding is determined by the correct base pairing between the two single-stranded molecules.Monohybrid cross: A monohybrid cross is a genetic mix of two people with homozygous genotypes, or genotypes with totally dominant or completely recessive alleles, resulting in opposing phenotypes for a certain genetic characteristic.P generation: The paternal generation is a basic P generation definition. The p generation is the first pair of parents in a genetic cross experiment. The F1 generation is the first generation created by the p generation.F1 generation: F1 refers to the first filial generation of seeds/plants or animal progeny produced by a cross-mating of markedly different parental types. In general, the characteristics of plants, insects, animals, and humans are the consequence of several gene interactions.F2 generation: It is the first filial generation resulting from the union of two separate parents. It is the second filial generation produced by crossing the F1 generation with oneself.To learn more on genetics click,
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The term __________ refers to the belief that those species of animals, including human beings, that are best adapted to their environment survive and prosper, whereas those that are poorly adapted die out.
a. social relativism
b. social Darwinism
c. social statics and dynamics
d. social eugenics
The term social Darwinism refers to the belief that those species of animals, including human beings, that are best adapted to their environment survive and prosper, whereas those that are poorly adapted die out.
What is species?
Species is a taxonomic rank used in the biological classification of living organisms, which is denoted by a Latin binomial, such as Homo sapiens. A species is defined as a group of organisms that can interbreed and produce fertile offspring, while members of different species cannot interbreed.
Therefore, Option B is correct.
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Suppose a geneticist uses a three point testcross to map three recessive, linked hummingbird wing shape mutations called tn, r, and b, where tn is associated with thin wings, r is associated with round wings, and b is associated with blunt wings. He first crosses homozygous blunt birds to homozygous thin, round birds. Next, he testcrosses the F1 progeny to thin, round, blunt birds. He obtained the results shown.Given this data, label the progeny phenotypic classes as either parental, single crossover (SCO), or double crossover (DCO) recombinant types. Each label may be used multiple times. Two classes have already been filled in.Phenotype Number Recombinant typeblunt 821 thin, round 815 round 179 thin, blunt 161 SCOthin 7 round, blunt 8 thin, round, blunt 24 SCOwild type 27 Answer Bank:parentalDCOSCO
The progeny phenotypic classes can be classified as parental: blunt and thick and round, SCO: thick and blunt, round, thick, round and blunt; DCO: thick, round and blunt.
First, the geneticist crosses homozygous rapid, zigzag flies with homozygous narrow flies. The Fi progeny is then testcrossed to fast, zigzag, and narrow parents, yielding the results shown in the table. A three point testcross in linkage analysis refers to examining the inheritance pattern of three alleles by mating a triple recessive homozygote with a triple heterozygote. It allows us to establish the spacing between the three alleles as well as their chromosomal order.
Based on the observation from the given data, the progeny phenotypic classes can be labelled as follows:
Blunt- parental
Thick, round- parental
Round- SCO
Thick, blunt- SCO
Thick- DCO
Round, blunt- DCO
Thick, round, blunt- SCO
Wild type- SCO
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fill in the blank. ___ which represents an organism that creates a body cavity, but that cavity is formed from the mesoderm and endoderm.
Coelomates are creatures with fluid-filled cavities in their bodies that are lined with tissue from the mesoderm germ layer. A bodily cavity that is lined is a real coelom.
The Mollusca, Annelida, Arthropoda, Echinodermata, and Chordata are only a few of the many animal phyla that are coelomates. All vertebrate species, including humans, are coelomates.
Pseudocoelomates are organisms with a body cavity that is partially lined with mesoderm tissue and partially filled with fluid. Between the mesoderm and the endoderm lies a hollow called a pseudocoelom. Rotten roundworms are pseudocoelomates (phylum Nematoda).
Earthworms, snails, insects, starfish, and vertebrates are eucoelomates, a class of creatures. Mesoderm and endoderm tissue make comprise the body cavity of a third group of triploblasts. Pseudocoelomates are these creatures.
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URGENT !!! PLEASE HELP ME
Match the terms to the best description.
1. Hydrolysis
2. Monomer
3. Fatty acid
4. Polysaccharide
5. Starch
6. Glucose
7. Carbohydrate
8. Lipid
9. Dehydration Synthesis
10. Monosaccharide
11. Polymer
12. Glycogen
13. Phospholipid
a. A large molecule made up of linked monomers
b. C₂H₁2O6
c.An organic compound with C, H, and O in 1:2:1 ratio
d. A carbohydrate used to store short-term energy in animals
e. Monomer of carbohydrates; "one sugar"
f. Another term for carbohydrate; made of many monosaccharides
g. Reaction that breaks up a polymer into monomers by adding
water
h. A lipid that has a hydrophilic head and 2 hydrophobic tails that
make up biological membranes
i. Long, linear molecule made of mostly Cs & Hs; monomer of lipids
j. A single unit that can be linked together to make a polymer
k. A biomolecule used for long-term energy storage
l.A carbohydrate used to store short-term energy in plants
m. Reaction that links monomers into a polymer by removing
Water
Answer: A. polymer
B. glucose
C. carbohydrate
D. glycogen
E. monosaccharide
F. polysaccharide
G. hydrolysis
H. phospholipid
I. fatty acid
J. monomer
K. lipid
L. starch
M. dehydration synthesis
Explanation:
Some hormones enter cells via _____. A) exocytosis. B) pinocytosis. C) receptor-mediated endocytosis. D) primary active transport.
determine the phenotypic ratios of the offspring. determine the phenotypic ratios of the offspring. 9 yellow-inflated : 3 yellow-constricted : 3 green-inflated: 1 green-constricted 9 green-constricted : 3 green-inflated : 3 yellow-constricted : 1 yellow-inflated 9 green-inflated : 3 green-constricted : 3 yellow-inflated : 1 yellow-constricted 9 yellow-constricted : 3 yellow-inflated : 3 green-constricted : 1 green-inflated
The children's phenotypes can be used to determine the unidentified genotype.
The children's phenotypes can be used to determine the unidentified genotype. If only dominant phenotypes result from mating the recessive phenotype individual with the unknown dominant phenotype (PP or Pp genotype), the unidentified person is homozygous dominant (no recessive). What is the name of the process used to determine the genotype of an unidentified person? Another essential invention by Gregor Mendel is the test cross. In a genetic experiment known as a test cross, a homozygous recessive organism with a dominant phenotype is crossed with an unknown genotype (and phenotype). In Mendelian genetics, the heritability of traits is the main focus. These characteristics are each bundled into a separate gamete, inherited separately, and frequently display dominance, where one characteristic's effects might conceal those of others.
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Kreb’s Cycle (What goes in and what comes out…Explain NAD+ to NADH here). For full points use the vocabulary HYDROGEN ATOM, PROTON, and ELECTRON in your answer
The Krebs Cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is a series of chemical reactions that occurs in the mitochondria of eukaryotic cells.
What is Kreb's cycle?The cycle is a key part of cellular respiration and is responsible for the production of energy in the form of ATP.
The cycle starts with the conversion of a molecule of acetyl-CoA, which is derived from the breakdown of glucose and other fuels, into citrate. This reaction is catalyzed by the enzyme citrate synthase and consumes one molecule of CoA and one molecule of oxaloacetate.
The citrate then undergoes a series of reactions that involve the removal of CO2 and the addition of hydrogen atoms (in the form of protons and electrons) to the molecule. These hydrogen atoms are picked up by a series of electron carriers, including NAD+ (nicotinamide adenine dinucleotide) and FAD (flavin adenine dinucleotide). The electrons from the hydrogen atoms are used to produce ATP and NADH (nicotinamide adenine dinucleotide) and FADH2 (flavin adenine dinucleotide) through the process of oxidative phosphorylation.
NAD+ is an oxidizing agent which accepts electrons and protons and is reduced to NADH. The electrons of NADH will be passed on to the electron transport chain to generate ATP. The cycle continues until all of the citrate has been converted back into its starting molecule, oxaloacetate.
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The continuity of life is based on heritable information in the form of DNA. How does the process of mitosis faithfully parcel out exact copies of this heritable information in the production of genetically identical daughter cells?
A. During mitosis, each chromosome becomes attached to the centromere. At anaphase, centromeres drag random chromatids toward the poles of the cell, where they become duplicated. As a result, two identical chromosomal sets form at each pole.
B. During mitosis, each chromatid of a duplicated chromosome becomes attached to the microtubule of one of the mitotic spindles. At anaphase, mitotic spindles pull the chromatids toward the poles of the cell, therefore forming two identical chromosomal sets at each pole. C. During mitosis, each chromosome becomes attached to the centromere. At anaphase, centromeres drag random chromosomes toward the poles of the cell, where they become duplicated. As a result, two identical chromosomal sets form at each pole. D. During mitosis, each duplicated chromosome becomes attached to the microtubule of one of the mitotic spindles. At anaphase, mitotic spindles pull the chromosomes toward the poles of the cell, therefore forming two identical chromosomal sets at each pole.
Every chromatid of such a duplicated chromosome attaches to a microtubule of a mitotic spindle during mitosis.Sister chromatids that are genetically identical to their parent cells are created during mitosis.
Through its four stages—prophase, metaphase, anaphase, and telophase—mitosis faithfully distributes perfect copies of this genetic material to create daughter cells that are genetically identical. A nuclear envelope deteriorates during prophase because it prevents the chromosomes from reaching the cytoplasm. Sister chromatids that are genetically identical to their parent cells are created during mitosis. The cell divides its copied chromosomes equally to ensure that each daughter cell does have a full set before copying, or "replicating," its chromosomes. Mitosis produces brand-new cells that are genetically similar to one another. Some algae species have the capacity for rapid growth. The enormous kelp Macrocystis pyrifera has a growth rate.
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The latest studies of bee colonies, which can include up to 80,000 individuals, shed new light on what some scientists believe is the most elaborate social structure next to human beings in the animal kingdom.
A. is the most elaborate social structure next to human beings in the animal kingdom
B. to be the animal kingdom's most elaborate social structure after human beings
C. is the most elaborate social structure in the animal kingdom next to that of human beings
D. to be the most elaborate social structure in the animal kingdom next to human beings
E. is the most elaborate social structure disregarding that of human beings in the animal kingdom
Correct Answer is C. is the most elaborate social structure in the animal kingdom next to that of human beings.
How does the division of labor within bee colonies contribute to their elaborate social structure?The division of labor within bee colonies is a key factor that contributes to their elaborate social structure. In a bee colony, there are three types of bees: the queen, drones, and worker bees. Each type of bee has a specific role and responsibility that they specialize in. The queen bee is responsible for reproduction, drones are responsible for mating and reproducing, and worker bees are responsible for foraging for food, taking care of the young, and maintaining the hive. This division of labor allows for a high level of efficiency and organization within the colony, which leads to the elaborate social structure that scientists have observed.
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name the labeled organelles in the animal cell model. orgaelle a hint: this organelle collects; packages, organizes, and distributes; proteins; carbohydrates; and lipids. organelle b (full name) hint: this organelle contains ribosomes b
Organelle A is Golgi apparatus and Organelle B is endoplasmic reticulum (ER) in animal cell model.
The Golgi apparatus, also known as the Golgi complex or Golgi body, is a cellular organelle found in eukaryotic cells that plays an important role in the modification, sorting, and transport of proteins and lipids. The Golgi is made up of several stacks of flattened, membrane-bound sacs called cisternae. The endoplasmic reticulum (ER) is a network of flattened, membrane-bound sacs and tubules that is present in the cytoplasm of eukaryotic cells. It is a multifunctional organelle that plays a crucial role in protein synthesis, folding, and modification.
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When a pathogen enters the body, it is recognized by immune cells that then respond to the pathogen. Which of the following identifies the component of the pathogen's cell membrane most likely to be recognized by an immune cell? A Cholesterol. B Phospholipids. C Glycoproteins. D Integral proteins.
C.Glycoproteins. The extra cytoplasmic face of the plasma membrane contains glycoproteins, which serve as receptors for immune cells and are also known as antigens, or chemical compounds that can elicit an antibody or immunological response.
The extracellular portions of proteins that extend outside of cells are frequently glycosylated as well. Additionally, glycoproteins are frequently significant membrane-associated proteins that participate in cell-cell communication. It is crucial to distinguish between reversible cytosolic-nuclear glycosylation and the secretory system's endoplasmic reticulum-based glycosylation. An additional regulatory mechanism that regulates phosphorylation-based signalling is expected to be involved in the modification of cytosolic and nuclear glycoproteins by the reversible addition of a single GlcNAc residue, which is thought to be reciprocal to phosphorylation.
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Please help 100 points
Global warming has had an impact on the migration habits of some species of birds. The image shows the changes in migration timing and chick hatching for one of the bird species impacted by rising global temperatures. It also outlines the change to the peak season for a species of caterpillar in the same ecosystem.
What prediction can be made about the impact the shift in caterpillar season will have on this ecosystem?
A. The caterpillars will eat many of the leaves on the trees, leaving the birds without a safe nesting place once they arrive.
B.The caterpillars that hatch earlier will compete with the baby birds for resources in the area.
C.The birds will migrate earlier so that they are present during the peak in caterpillar season.
D.The birds will miss the peak season for caterpillars, leaving the babies with less food and leading to a decrease in population size.
Answer:
The answer is D. The birds will miss the peak season for caterpillars, leaving the babies with less food and leading to a decrease in population size.
The birds will miss the peak season for caterpillars, leaving the babies with less food and leading to a decrease in population size. Hence, option D is correct.
What is global warming?Climate change includes global warming, which is the gradual increase in the earth's temperature. It is brought on by an increase in greenhouse gas concentrations in the atmosphere, primarily as a result of human activities like farming and the burning of fossil fuels.
Environmental changes brought on by global warming may have a negative influence on human health. Additionally, it can result in an increase in sea level, which poses a threat to biodiversity, a change in precipitation patterns, an increase in the likelihood of droughts and floods, and the loss of coastal land.
Due to global warming, The birds will miss the peak season for caterpillars, leaving the babies with less food and leading to a decrease in population size. Hence, option D is correct.
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Which of the following best illustrates the importance of altered DNA nucleotides in evolutionary processes?
a. Bacteria have a single circular chromosome whereas eukaryotes have several linear chromosomes
b. short bits of single-stranded DNA left at the end of DNA molecules cut by restriction enzymes
c. the fragments will bond to other fragments with complementary single-stranded ends
d. In a temporally variable environment, a population of bacteria with an elevated rate in replication error can have a selective advantage over other populations with lower rates in replication error.
Another mechanism that remove & replace damaged bases is nucleotide excision repair. The DNA double helix can sustain several sorts of damage, which nucleotide excision repair can identify and fix.
Describe a nucleotide?They function as deoxyribonucleic acid polymers' monomeric units. A phosphate group, a five carbon sugar, as well as a nitrogenous base make up a nucleotide. Adenine, cytosine, purine, and thymine are the four nitrogenous compounds found in DNA. Instead of thymine, uracil is found in RNA. All recognized living things have genetic material made up of a chain of nucleotides. They perform numerous other tasks, such as acting as molecules that move energy and as messengers, in addition to storing genetic information.
Describe a polymer?Greek terms for whence the word "polymer" is derived.
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A _______ is the complete set of chromosomes of an organism, arranged and and displayed in pairs and ordered by size. (Select the BEST answer.)
a. genome
b. karyotype
c. nucleus
d. heredity
e. gene
Answer:
b. karyotype
Explanation:
A karyotype is the complete set of chromosomes of an organism, arranged and displayed in pairs and ordered by size. It is used to identify chromosomal abnormalities and to study the genetic makeup of an organism. The karyotype can be visualized through a microscope after staining the chromosomes to make them visible. It is a powerful tool in genetics, as it can be used to identify specific chromosomal disorders and to study the genetic makeup of an organism.
The following questions refer to the essential steps in meiosis described below.1. Formation of four new nuclei, each with half the chromosomes present in the parental nucleus2. Alignment of tetrads at the metaphase plate3. Separation of sister chromatids4. Separation of the homologues; no uncoupling of the centromere5. Synapsis; chromosomes moving to the middle of the cell in pairsFrom the descriptions above, which of the following is the order that most logically illustrates a sequence of meiosis?1, 2, 3, 4, 55, 3, 2, 4, 14, 5, 2, 1, 35, 2, 4, 3, 1
The following questions refer to the essential steps in meiosis described below is Separation of sister chromatids .
What is difference between chromosomes and chromatids?Chromosomes carry DNA, which is the genetic material of that organism. Chromatids help the cells to duplicate and in turn, aid in cell division. A chromosome is present throughout the life cycle of the cell. A chromatid is formed only when the cell under goes through either mitosis or meiosis stages.
Is a chromosome 1 or 2 chromatids?Chromatid is one of the halves of a chromosome. A chromosome contains only one chromatid. When the cell cycle occurs then after the completion of the S-phase of the cell cycle, the chromosome contains two identical sister chromatids.
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part c what are the possible results of a nondisjunction event in meiosis i versus in meiosis ii? sort each item to the appropriate bin. if a description can apply to both meiosis i and ii, sort it to the third bin. resethelp nondisjunction in meiosis idroppable nondisjunction in meiosis iidroppable nondisjunction in either meiosis i or meiosis iidroppable
Non disjunction is a genetic error that occurs during meiosis, the process of cell division that produces sperm and egg cells. There are two types of meiosis: Meiosis I and Meiosis II. Here are the possible results of a nondisjunction event in each type of meiosis:
What are the possible results of a nondisjunction event?Meiosis I:Chromosomes fail to separate properly, resulting in one cell with an extra chromosome and another cell with a missing chromosome. This can lead to conditions such as Down Syndrome (extra chromosome 21) or Turner Syndrome (missing chromosome X).A cell may end up with an extra set of chromosomes, resulting in a condition known as trisomy. Meiosis II:Chromosomes fail to separate properly, resulting in one sperm or egg cell with an extra chromosome and another sperm or egg cell with a missing chromosome. This can lead to a fertilized egg with an extra or missing chromosome, leading to conditions such as Down Syndrome or Turner Syndrome.Nondisjunction in Either Meiosis I or Meiosis II:Chromosomes may end up in the wrong cell, leading to a condition known as translocation.Chromosomes may break and reattach in a different place, leading to a condition known as inversion.It is important to note that while these errors in meiosis can lead to genetic disorders, they can also occur without any noticeable effects. Nondisjunction events are also a major contributor to genetic diversity in a population.To learn more about nondisjunction event refer:
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One variant in the green groups (Groups 1, 3, and 6) was used to make a vaccine that was distributed very early in the pandemic. Based on the graphed data, does it look like the vaccine was effective? Why or why not?
The green line never reaches 100 on the y-axis, indicating that it was successful used to make a vaccine that was distributed very early in the pandemic.
An effective acquired immunity to a specific infectious or cancerous disease is provided by a vaccination, which is a biological preparation. [1] Numerous studies and independent assessments have confirmed the vaccinations' efficacy and safety. The typical component of a vaccination is an agent that closely resembles a microbe that causes a disease; this agent is frequently created from weakened or deceased versions of the microbe, its toxins, or one of its surface proteins. The agent induces the body's immune system to identify the agent as a threat, eliminate it, and then identify and eliminate any associated bacteria that it may come into contact with in the future.
Vaccines can be either preventive (to shield against or lessen the symptoms of a future infection by a natural or "wild" pathogen) or therapeutic (to treat a condition that has already developed).
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FILL IN THE BLANK In the diploid cells of an organism, there can be ______ different allele(s) of a given single-copy nuclear gene
In the diploid cells of an organism, there can be three different allele(s) of a given single-copy nuclear gene.
A specific gene in a diploid organism has three distinct alleles. Two of these three alleles display co-dominance, and one of them is recessive. A specific gene in a diploid organism has three distinct alleles. A specific gene in a diploid organism has three distinct alleles.
Two of these three alleles display co-dominance, and one of them is recessive. When an organism's cells have two full sets of chromosomes, with one chromosome from each parent present in each pair, the organism is said to be diploid. Since humans have 23 chromosomal pairs in the majority of their cells, they are diploid.
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Taking in carbon dioxide in hot, dry conditions is a challenge for plants because they can lose water through their open pores. Plants get around this by:
Opening pores just long enough to get carbon dioxide and convert it to a 4C sugar, then completing sugar fixation in a separate location away from the pore (This is done by _____ plants, like _____).
Opening pores at night to get carbon dioxide and convert it to a 4C sugar, then completing sugar fixation with pores closed during the day (This is done by _____ plants, like _____).
Opening pores just long enough to get carbon dioxide and convert it to a 4C sugar, then completing sugar fixation in a separate location away from the pore (This is done by CAM plants, like cacti and succulents).
Opening pores at night to get carbon dioxide and convert it to a 4C sugar, then completing sugar fixation with pores closed during the day (This is done by C4 plants, like corn and sugarcane).
What are the CAM about?CAM (Crassulacean Acid Metabolism) plants, like cacti and succulents, open their stomata (pores) at night when it is cooler and more humid to take in carbon dioxide and convert it to a 4C sugar. They then complete sugar fixation in a separate location away from the stomata, reducing water loss during the day when it is hot and dry.
Therefore, C4 plants, like corn and sugarcane, open their stomata at night to get carbon dioxide and convert it to a 4C sugar, then complete sugar fixation with the pores closed during the day, also reducing water loss during the day when it is hot and dry.
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In 2010 scientists excavated a skull fossil that provides evidence of a newly discovered species of big cat. Scientists hypothesize that big cats branched off from smaller wild cats about 6 million years ago. Which of these resources did the scientists most likely rely on to form their hypothesis?
answer choices
a food web showing feeding relationships of organisms where the fossil skull was found
population and migration data for small wild cats living in the ecosystem where the skull was found
the fossil record and DNA comparisons of big cats and small cats
the historical record of interactions between different species of big cats
The ratio of radioactive argon to radioactive potassium in a rock is measured using the potassium-argon dating method to establish the age of the rock.
The best method for dating a fossilized skull associated with Homo Erectus, a species that emerged around 1.9 million years ago, would likely be potassium-argon (K/A) dating of the supporting rock. By measuring the ratio of radioactive potassium to radioactive argon in the rock, the potassium-argon dating technique establishes the age of rocks. This dating technique is based on the radioactive potassium-40, which is present in minerals and rocks, decaying to radioactive argon-40 and calcium-40. From 4.3 billion years ago (the Earth's age) to around 100,000 years ago, potassium-argon dating is reliable. With present detection methods, only 0.0053% of the potassium-40 in a rock would have converted to argon-40 after 100,000 years.
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