At the end of sea floor spreading, the center of the ridge solidifies molten rock. So, the correct answer is (A).
What is Seafloor Spreading?
Sea floor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then slowly moves away from the ridge.
The rate of sea-floor spreading is greater and faster in the Pacific Ocean than in the Atlantic and Indian Oceans. At their spreading rate of about 15 cm (6 in) per year, the entire crust beneath the Pacific Ocean (about 15,000 km [9,300 mi] wide) could be created in 100 million years.
Ridges are new ocean floor being added to Earth's lithosphere, which in turn caused the continents to move apart. Hence, it is called sea floor spreading.
Thus, at the end of sea floor spreading, the center of the ridge solidifies molten rock. So, the correct answer is (A).
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Which of the outcomes would occur if a moss had a mutation that inhibited the production of sporopollenin?.
If moss had a mutation that inhibited the production of sporopollenin, the spores would dry out more quickly.
Sporopollenin is a biological polymer that is chemically inert.
It contributes significantly to the tough outer (exine) walls of plant spores and pollen grains.
It is found in soils and sediments.
Sporopolenin's Function:
One of the most resistant organic compounds is known as sporopollenin.
Because sporopollenin is a component of plant spore exine, it protects pollen grains from external factors such as temperature, acid, alkali, etc.
Due to sporopollenin, pollen grains are preserved as fossils, which cannot be degraded by enzymatic activity.
A spore is a type of cell produced by fungi, plants (moss and ferns), and bacteria. Spores play a role in reproduction. To defend themselves, certain bacteria produce spores. The walls of spores are thick. They can withstand extreme heat, humidity, and other environmental conditions.
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in order for natural selection to change a trait within a population, what must be true about the trait? the trait must protect an individual from predators. the trait must be present in individuals that cannot mate. the trait must be uniform across the population. the trait must have a genetic basis.
The correct answer (d) the trait must have a genetic basis.
What must be true for natural selection to happen the population?
Natural selection requires the occurrence of four factors: reproduction, inheritance, variation in organism fitness, and variation in individual traits among population members. Natural selection happens spontaneously if they are satisfied.
What prerequisites must be met for natural selection to occur?
Resources must be limited in the ecosystem.
What is genetic basis.?
Adenine (A), cytosine (C), guanine (G), and thymine (T) are the four bases of DNA (T). These bases come in particular pairs (A with T, and G with C). Base pair can also refer to the actual number of base pairs in a sequence of nucleotides, such as 8 base pairs.
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this is about punnett squares!! the question is below in the picture. please help me fill out the graph also. thank you so much!!
Explanation:
hi I can't see the picture
Distinguish between the characteristics associated with each of the four types of gene regulation.
based on the traits connected for each of the four varieties of gene regulation Post-transcriptional, Translational, Post-translational, and Transcriptional.
What procedures are used to control genes?The complex process of regulating gene expression can be influenced at various stages, such as transcription, which was before splicing and export, rna stabilization, translating, protein modifications, or protein half-life.
Simply put, what is gene regulation?The mechanism by which genes are regulated affects when, where, and how much they are expressed. Regulational proteins and chemical modifications to DNA are just two of the many mechanisms that can be used to carry out the process, which can be intricate.
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when a cross between a red and white flower results in an offspring flower that has patches of both red and white, we describe this phenomenon as ?
When a cross between red and white flowers produces offspring flowers that have red and white spots, it describes this phenomenon is codominant.
What is codominance?Codominance is a form of inheritance in which alleles of a gene pair in a heterozygote are fully expressed. As a result, the phenotype of the offspring is a combination of the phenotype of the parent. Thus, the trait is neither dominant nor recessive.
Examples of codominance in humans are exemplified by individuals with blood type AB. A person who inherits the IA and IB alleles will have blood type AB because IA and IB are codominant and therefore will be expressed together.
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A cell containing 12 replicated chromosomes at the beginning of mitosis will have how many chromosomes after the completion of mitosis?.
12 chromosomes remain once mitosis is complete.
A cell contains 12 chromosomes. Each daughter will have how many chromosomes?Following mitosis, identical cells with the same starting number of chromosomes as the parent cell are created. In this instance, following mitosis, if a cell has 12 chromosomes, each daughter cell will also have 12 chromosomes.
When meiosis first begins, does a cell have 12 chromosomes?In general, meiosis produces four haploid cells from a diploid parent cell. Therefore, if a cell has 12 chromosomes at the conclusion of reduction division during meiosis I, the parent cell had 24 chromosomes at prophase I.
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eccentric contraction occurs when the muscle lengthens during a contraction against resistance, while concentric contraction occurs when the muscle
Concentric contraction ,occurs the muscle tension rises to meet the resistance then remains stable as the muscle shortens.
Concentric muscle contractions are used to generate motion, eccentric muscle contractions are used for resisting or slowing motion. Concentric contraction occurs when the total length of the muscle shortens as tension is produced example include upward phase of a biceps curl is a concentric contraction.
Eccentric contraction happens when the total length of the muscle increases when the tension occurred .example include lowering phase of a biceps curl.
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a woman who lives in the country discovers a brown recluse spider in her attic. the woman plans to get rid of the spider by spraying a pyrethroid-based pesticide around the edges of the attic. describe two alternate solutions that do not involve chemical pesticides and explain an advantage of each alternate solution.
Neem oil and Pyrethrum are two alternate solutions that do not involve chemical pesticides and explain an advantage of each alternate solution.
Pesticides are chemicals used to control pests. These are herbicides, insecticides, nematicides, molluscicide's, piscicides, avicides, rodenticides, bactericides, insect repellents, animal repellents, microbicides, fungicides, and lampricides. Herbicides are the most frequent of them, accounting for over 80% of all pesticide use. Most insecticides are designed to protect plants from weeds, fungus, or insects. The fungus Alternaria solani, for example, is employed to control the aquatic weed Salvinia.
Pesticides, in general, are chemical (such as carbamate) or biological agents (such as a virus, bacterium, or fungus) that deters, incapacitates, kills, or otherwise discourages pests. Insects, plant pathogens, weeds, mollusks, birds, mammals, fish, and nematodes are examples of pests.
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people who activities focus on such domesticated animals as cattle, sheep, goats, camels, yak, and reindeer are called
People who sports recognition on such domesticated animals as cattle, sheep, goats, camels, yak, and reindeer are called herders.
These herders are human beings whose sports recognition on such domesticated animals such as cattle, sheep, goats, camels, yak, and reindeer. It's a transformation of “ an traditional” into “a new modern” societies through which industrialization of the economy. The domestication of herding animals and the improvement of pastoralist societies have performed a key function in human economic, ecological, and social records. Pastoralism helps sizeable human populations in Eurasia, Africa, and South America, and each pastoralists and different farmers nonetheless depend predominantly at the few animal species that had been domesticated withinside the early to mid-Holocene.
Understanding converting human-animal members of the family with domestication and the improvement of pastoralism offers insights into the biodiversity of the animals on which modern pastoralists depend, the records of milk-drinking, and the coevolution of human beings and home animals. Archaeology offers broad views on pastoral societies as complicated and bendy social constructs, kinds of threat management, and as resilient structures developed over millennia to assist human beings to deal with aridity, climatic changes, and environmental extremes.
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Compared to african homo erectus, the homo erectus fossils found in dmanisi have.
Compared to african homo erectus, the homo erectus fossils found in dmanisi have smaller body and brain sizes.
Some scientists think that the specific characteristics of the Dmanisi fossils—such as the smaller body and brain sizes—indicate that this species—which may be known as Homo georgicus—is more primitive than Homo erectus.
Some people believe that these characteristics merely reflect the fact that H. erectus was a very early member of the genus. Scientists have a number of issues concerning the spread and development of hominins after studying the fossils from the Dmanisi hominin site.
These discoveries imply a considerably earlier migration of hominins from Africa through the Levantine Corridor to the Caucasus and ultimately to southern Asia and the Far East.
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some species of insect are thermogenic and capable of producing their own heat using the same organelle that we use. if a physiologist wanted to study the mechanism of heat production, what cellular component should she focus on?
The cellular organelle that should be focused while studying about the mechanism of heat production is: mitochondria.
Cell organelles are the sub-cellular components of the cell that work in order to make the cell alive and functional. There are various cell organelles like nucleus, mitochondria, ribosomes, chloroplast, Golgi body, etc.
Mitochondria is the cell organelle involved in the formation of ATP for the life processes to be performed. Thus, mitochondria is actively involved with energy transduction and therefore contributes the maximum in heat production. Mitochondria is a double membranous cell organelle where ATP is produced in the inner mitochondrial membrane.
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If the water molecule concentration outside the cell is higher than the inside of the cell, the solution outside of the cell is _______.
Answer: I think this is the answer but I'm not sure but it should be correct! So here it is hypertonic.
Explanation: I hope this is what you were looking for!!! : D
What unusually biodiverse island is home to the dragon blood tree, which appears to bleed when cut?.
Answer:
Socotra Island
Explanation:
What does it mean for DNA to have antiparallel strands and what does it enable DNA to do?
Meaning for DNA to have antiparallel strands and what does it enable DNA to do is explained below.
Antiparallel strands of a DNA molecule means the phosphate teams at the beginning of 2 DNA strands square measure in opposite position (pole). DNA (Deoxyribonucleic Acid) consists of 2 polynucleotide strands (the polymers of nucleotides), that forms what seems like a ladder.
DNA is that the info molecule. It stores directions for creating alternative giant molecules, referred to as proteins. These directions are hold on within every of your cells, distributed among forty six long structures referred to as chromosomes. These chromosomes are created from thousands of shorter segments of DNA, referred to as genes.
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If you want to protect the plants from insect damage, should you encouraged birds to forage on the plants, or put netting over the plants to keep birds out? explain your reasoning.
The insect converts about ten percent of the plant's energy into biomass.Only 10% of the insect's energy is subsequently converted by the bird into biomass. As you move up the food chain, this persists.
This explains why an ecosystem's energy model has a pyramidal structure. The biomass decreases as you move up the food chain.This is because energy is transferred very inefficiently across tropic levels, with 90% of the energy being wasted to the environment as heat energy.In the scientific discipline of biotechnology, organisms’ genetic makeup is altered. This raises the standard of living.Inserting a gene that causes plants to release compounds that fight insects into them is the best choice among the possibilities presented. This is due to the fact that it entails altering the genome of the plant organism in order to provide it resistance to insect invasion.
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how the structure of dna determines the structure of proteins which carry out the essential functions of life through systems of specialized cells.
The structure of DNA determines the structure of proteins because proteins are made by the central dogma process where DNA is the initial component.
In the process of the central dogma, transcription is the process through which the DNA is transcribed into the mRNA. Through the information in the mRNA, proteins are produced by the translation process.
Hence, the structure of proteins as well its function etc are all determined by the DNA whose information is transcribed and translated for the formation of that particular protein.
Each protein formed from the transcription and translation of DNA has a specialized function to perform.
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sediments along the coast are moved in and out of littoral cells (as part of a sediment budget) primarily by
Littoral cells are the areas of the coastline where sediment is constantly being moved in and out. This is usually done by waves and currents. The main reason for this is to keep the coastline from eroding away.
The movement of sediment along the coast is primarily controlled by the processes of erosion and deposition. Erosion is the process by which wave action and other agents break down and wear away rocks and other materials. This process typically occurs along the shoreline, where waves crash against the land.
Deposition is the process by which eroded materials are transported and deposited elsewhere. This can occur either offshore, where materials are carried by currents and then deposited on the seafloor, or onshore, where materials are transported by currents and then deposited along the shoreline.
The movement of sediment in and out of littoral cells is an important part of the sediment budget. The sediment budget is the balance between the amount of sediment that is being eroded and the amount that is being deposited. Littoral cells are areas of the coast where sediment is constantly being moved in and out. These areas are usually located near river mouths or along the shoreline.
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Bacteria with the ability to break down certain types of plastic are placed with a colony of E. coli bacteria that lack this ability. Plasmid transfer occurs between the two colonies of bacteria and some of the E. coli gain the ability to break down plastic as well. What inference can be drawn about the nature of plasmids from this observation?
A.
Plasmids are lipids which provide energy for the cell.
B.
Plasmids are proteins which build tissues.
C.
Plasmids are nucleic acids which can pass on traits.
D.
Plasmids are carbohydrates which provide structural support.
The inference that can be drawn from the given observation is that: (C) Plasmids are nucleic acids which can pass on traits.
Plasmids are the circular, double-stranded genetic components present especially in the bacterial cells. They are self-replicating structures. They are different from the chromosomal DNA. The plasmid is also a form of DNA.
Nucleic acids are the biomolecules that contain an organism's genetic information. There are two types of nucleic acids: DNA and RNA. DNA is the most prevalent form of nucleic acid as it is more stable. The basic structural unit of nucleic acids is nucleotides. Nucleotides are further composed of sugar, phosphate group and nitrogenous bases.
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what would be a gene of the white blood cell that is turned on
Answer:
The DNA triggers other white blood cells to release proteins known as type 1 interferons, which help our bodies fight viruses and some bacteria.
Explanation:
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The rate of transcription for a gene is found to be affected by a mutation. Where would you expect the mutation to appear on the dna?.
If the rate of transcription is affected by the mutation, the mutation is found in the exons region of the template DNA strand. This is the reason why transcription rates are affected.
How is the transcription affected?The transcription is a process by which the mRNA is formed from the DNA, and the mature mRNA consists of exons from the gene. These exons can form polypeptide chains during the protein synthesis process.
If the mutation happens in the promoter region of the mRNA or inside any sequence of mRNA, then it slows down the process, and as a result, the rate of transcription is slowed. The mutation changes the structure of the mRNA; as a result, the RNA polymerase can't cross it and carry out transcription at the slow rate.
Hence, the exons region of the gene that is present in the DNA should be mutated in order to slow the rate of transcription.
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The entire collection of the genes and their alleles in a population is called the gene?.
The entire collection of genes and their alleles in a population is called the gene pool.
Gene pool is the total amount of genetic material in a population at any given time. The term typically refers to a population of individuals belonging to the same species, which includes all of the population's genes and gene combinations (the sum of the alleles). Through evolution, the gene pool of a population can change over time. This can happen through mutations, natural selection, and genetic drift, among other mechanisms. The end result is a modified gene pool that is tailored to the particular requirements of the population's environment.
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what is the name of the specialized, folded region of the sarcolemma that contains cation channels called acetylcholine receptors to which ach binds?
Postjunctional folds contains cation channels called acetylcholine receptors to which ach binds.
The sarcolemma on the junction has invaginations called postjunctional folds, which boom its floor place going through the synaptic cleft. These postjunctional folds shape the motor endplate, that's studded with nicotinic acetylcholine receptors (nAChRs) at a density of 10,000 receptors/micrometer square.
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Which recombination frequency corresponds to perfect linkage and violates the law of independent assortment?.
The law of independent assortment is broken when the recombination frequency is zero, which is a perfect association.
A genetic linkage map is made using recombination frequency, a measure of genetic connection. Recombination frequency is the proportion of times during meiosis that a single chromosomal crossover takes place between two genes.
Alleles from two distinct genes are selected into gametes independently of one another, according to Mendel's law of independent assortment. In other words, a gamete's acquisition of an allele for one gene does not affect the allele for another gene.
Crossbred two-hybrid rabbits are used. The genotype of both rabbits is BbGg. Each rabbit generated gametes prior to breeding. Alleles are divided during this process, and each chromosome's copy is given to a different gamete.
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In cellular respiration, where do the electrons that are pulled off of glucose end up?.
In cellular respiration, where do the electrons that are pulled off of glucose end up in water.
As electrons move through the electron transport chain, they go from a higher to a lower energy level and are ultimately passed to oxygen forming water.
In cellular respiration the electrons are donated to oxygen, which is the final electron acceptor in the oxidation-reduction reactions stage. Carbons obtained from glucose end up in ATP molecules at the end of cellular respiration. Their Energy is stored within the chemical bonds within the glucose molecule.
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Epidermal cells, xylem, phloem, and connective tissue work together to make a leaf. This is an example of a(n) _________. A. Organism B. Tissue C. Organ D. Organ system
The statement epidermal cells, xylem, phloem, and connective tissue work together to make a leaf makes reference to an organ (Option C).
What is an organ in an organism?An organ in an organism is a group of different tissues that work together to play one or more specific roles such as in the case of leaf to produce photosynthesis products.
Therefore, with this data, we can see that an organ in an organism refers to many different tissues which work in a concerted manner to play one or more functions in the organism.
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one reason that atp is a source of energy is that the products of atp hydrolysis have less free energy than the reactants. why? hydrogen bonding between free phosphate and water formation of ion pairs involving atp resonance stabilization of free phosphate electrostatic repulsion in atp
Answer: it’s listed here
Explanation: account Mrs Delano
because their internal osmolarity is similar to that of seawater, osmoconformers . multiple choice question. tend not to lose or gain water by osmosis tend to gain water by osmosis tend to lose water by osmosis
Because their internal osmolarity is similar to that of seawater, osmoconformers tend not to lose or gain water by osmosis. Thus, the correct option is A.
What is an osmoconformer?
An osmoconformer is an animal that is iso-osmotic with its external environment. All osmoconformers are marine animals. And, because an osmoconformer's internal osmolarity is the same as that of its external environment, there is no tendency to gain or lose water.
Most of the marine invertebrates including starfish, crabs, jellyfish, lobsters, sea squirts, and scallops are osmoconformers. Such organisms do not need to expend as much energy as osmoregulators in order to regulate ion gradients in the water.
Therefore, the correct option is A.
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Describe two ways that plants or animals can respond to changes in their surroundings
Plants have the capacity to respond to light, phototropism, and gravity, gravitropism.
Response of plants to the environmentPlants have the capacity to respond to their environment just like every other living organism. They respond to light, gravity, touch, water, and so on.
The response of plants to light is called phototropism. Responses can be positive or negative. Most plant's shoots are positively phototrophic while their roots are mostly negatively phototrophic.
In other words, the shoots of plants will always move toward light sources while their roots always tend to move away from sources of light. This fact has been demonstrated in several experiments.
The response of plants to the force of gravity is known as gravitropism. This response, just like response to light, can be positive or negative. The force of gravity acts vertically downward. As a rule of thumb, plants root respond positively to gravity while their shoots are always negatively gravitrophic.
In othe rwords, the roots of plants will always grow downward in the same direction as the force of gravity while their shoots will always grow upward in opposition to gravity.
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peyer's patches and the tonsils are part of the collection of small lymphoid tissues that protect the upper respiratory and digestive tracts from infection and are referred to as .
Peyer's patches and the tonsils are part of the collection of small lymphoid tissues that protect the upper respiratory and digestive tract from infection and are referred to as MALT or mucosa-associated.
What are lymphoid tissues?
Organized tissues called lymphoid tissues aid immune responses. The bone marrow and the thymus are the primary lymphoid tissues and the sites of lymphocyte production. For instance, Peyer's patches, tonsils, spleen, and lymph nodes are examples of secondary lymphoid tissue.
It is made up of reticular fiber-based connective tissue that is permeated with a variety of leukocytes (white blood cells), primarily lymphocytes, through which the lymph flows. Lymphoid follicles are parts of the lymphoid follicles that are crammed full with lymphocytes.
Therefore, Peyer's patches and the tonsils are part of the collection of small lymphoid tissues that protect the upper respiratory and digestive tract from infection and are referred to as MALT or mucosa-associated.
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Which widely used energy sources are nonrenewable and also a source of greenhouse gas emissions?.
Fossil fuels are energy sources which are nonrenewable and also a source of greenhouse gas emissions
What are Non-Renewable energy ?Coal, natural gas, oil, and nuclear energy are examples of nonrenewable energy sources. Since we currently rely on these resources to meet the majority of our energy needs, once they are depleted, they cannot be replaced, which poses a serious issue for humanity.
Burning fossil fuels for transportation, electricity, and heating accounts for the majority of greenhouse gas emissions caused by human activity in the United States.Wind and solar energy are readily available, emit little to no greenhouse gases, and are typically less expensive than coal, oil, or gas.Learn more about Non- Renewable energy here:
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Answer:
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