Answer:
B
Explanation:
Molecules and ions diffuse through cell membrane due to a concentration gradient. But, once the equilibrium is achieved between inside and outside the cell, molecules stop moving. Thus, option B is correct.
What is cell membrane?Cell membrane is an organelle surrounding the cell which facilitates the transportation of ions and molecules, inside and outside the cell. To maintain an ionic balance is important in metabolism of living things.
Ions such as sodium and potassium are balanced by a mechanism called sodium -potassium pump. The sodium ions outside the cell is greater than that of inside.
Similarly calcium pump works for calcium and magnesium. The concentration gradient of these ions make this flow of ions across cell membrane. Hence, once they achieve equilibrium the flow will stop and no ions will be transported across the membrane.
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please help Most ovens we use at home are powered by electricity or natural gas. These ovens use fossil fuels. Describe why the
energy used by a solar oven is considered a clean source of energy.
Answer:
Explanation:
Clean energy are renewable energy. This are energy from natural sources that are renewed without extra cost. Sun, wind, water are examples of renewable natural resources that helps generate clean energy.
The energy are refer to as clean because, they do not lead to any deposit of gasses that can affect the environment leading to environmental pollution. They have little or no side effects, no combustions or release of gases that are toxic or can deplete the environment as in the case of non- renewable energy.
What is the shape of the eye? oval circle sphere dodecahedron
Which category of biological molecule includes DNA?
1. carbohydrate
2. nucleic acid
3. protein
4. lipid
Answer: DNA is a nucleic acid
Explanation:
The acronym DNA stands for deoxyribonucleic acid.
What do you call the process of water seeping into the ground?
Answer:
Process of seeping (flow or leak slowly through a porous material or small holes) of water into the ground is called infiltration. Infiltration is the process by which water on the ground surface enters the soil.
Water not used by plants moves deeper into the ground. The top of the water in the soil, sand, or rocks is called the water table and the water that fills the empty spaces and cracks is called groundwater. Water seeping down from the land surface adds to the groundwater and is called recharge water.
Hence The process of water seepage into the ground is called Infiltration.
The diagram below shows the branching tree diagram for cats.
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled from the from left to right as Amphibians, Reptiles, Marsupials, Dogs, Cats.
Which shared derived characteristic do reptiles, marsupials, and dogs have?
Amniotic egg
Fur
Retractable claws
Shearing teeth
Answer:
I am pretty sure it is shearing teeth
Explanation:
Answer:
shearing teeth
Explanation:
1. How would you describe motion?
T_T
Answer:
The action of moving or being moved
Answer:
Motion is when the position of something changes after a period of time
Explanation:
Which substances can pass directly through cell surface membranes and do not use a carrier protein or chanel protein?
1 K+ and C∫- 2 CO2 3 C6H12O6
A 1 and 2
B 1 and 3
C 2 and 3
D 2 only
Answer:
D
Explanation:
A frog is able to live on land once it reaches the adult stage of its life cycle because it forms А. a large head and two legs B. lungs, which help it take in oxygen from the air, and four legs. a long tail and four legs. gills, which help it take in oxygen from the water, and two legs.
Answer:
I think that "gills, which help it take in oxygen from the water, and two legs." this is the answer
Explanation:
Hope this helps<3
A frog is able to live on land once it reaches the adult stage of its life cycle because it forms lungs, which help it take in oxygen from the air and four legs. The correct option is b.
What are amphibians?Amphibians are animals with vertebral columns that live on land and in water. Their skin is permeable, allowing them to breathe and respire. They are also cold-blooded and have a complicated life cycle.
Different from reptiles, amphibians lay unshelled eggs in the water. The eggs lack a soft and hard shell covering, but are protected from drying out by a jelly-like material.
Amphibians are four-legged creatures that can live on both land and water. The majority of amphibians deposit their eggs in water.
Therefore, the correct option is B. lungs, which help it take in oxygen from the air and four legs.
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Sphere interactions are driven by two sources of energy. The EXTERNAL source of energy comes from what?
Answer:
From the Sun
Explanation:
Solar power is energy turned by the sun into thermal or electricity. The cleanest and most generous source of usable green energy is solar energy.
Solar energy, Solar radiation capable of heat creation, chemical reactions or power generation. The cumulative number of solar energy events on earth significantly exceeds existing and planned energy needs worldwide.
DESCRIBE how the defect in the Single-Mutant (Sev−) R7 precursor cell causes the cell to become a cone cell instead of a photoreceptor cell
Answer and Explanation:
Cells directed their growth by getting the signals from distant or local bases and respond by directing signals. Each signal changes the cell state and decides how cells reply to consequent signals. RTK (receptor tyrosine kinase) signaling is needed for the arrangement of the R1-R7 photoreceptors. It activates the phyllopod transcription through the Ras/MAPK pathway. The Phyllopod transcription codes an adapter protein that guides the ubiquitin ligase Sina to target the transcription factor named Ttk (tram track) for deprivation. Tram track (Ttk) is the main inhibitor of the development of photoreceptors. The cells that do not damage Ttk become the ommatidium components, while those cells that damage it continues to develop photoreceptors. Receptor tyrosine kinase signaling is also involved in the development of ommatidium. Receptor tyrosine kinase signaling controls the propagation and existence of cells before they are employed in the cluster. RTK also regulates the differentiation of cone cells. Whether a cell becomes a photoreceptor or not is also decided by RTK signaling events.
Example and nature of Pollination being driven by symbiotic
Relationship besides bees explain how the plant and animal benefit
Which two genes are most likely to be affected by a crossing over event?
A. a pair of genes located adjacent to another on a chromosome
B. a pair of genes separated by a third gene on a chromosome
C. a pair of genes located at opposite ends of a chromosome
D. a pair of genes located on different chromosomes
Answer:
C
Explanation:
i just took this test
As altitude increases, air pressure __________ (increases, decreases, or stays the same). This is a(n) ________(direct, indirect, of static) relationship. PLEASE HELP :)
Answer:
The correct answer is - decreases. direct.
Explanation:
Altitude is a distance measurement of distance in a vertical manner or how high something from the sea level. It helps in the height of the mountains and different places.
Air pressure and altitude are the two factors that are in direct relation as the air pressure decreases with the increase in altitude. the gases present in the higher elevations are fewer than the sea level.
Consider a diploid organism. What is the genotypic ratio expected to be observed in the offspring produced by two heterozygous parents
Answer:
See the answer below
Explanation:
A diploid organism is one that has 2 copies of each of its genes. When the two genes are the same, they are said to be homzygous, and when they are different, they are said to be heterozygous.
In this case, let us assume that the trait in question is represented by A for the dominant version and a for the recessive version. Since the parents are heterozygous, it means their genotypes would be Aa.
Aa x Aa
AA Aa Aa aa
Hence, the genotype ratio would be 1AA:2Aa:1aa. In other words, the genotypic ratio of homzygous to heterozygous offspring would be 1:1 because AA and aa are both homzygous while Aa is heterozygous.
The geno-typic ratio expected to be observed is 1:1
The following information should be considerd:
A diploid organism is that where it has 2 copies of each of its genes.When the two genes are similar, they are said to be homo-zygous else hetero-zygous.Since the parents are heterozygous, it means their genotypes would be Aa.
Aa x Aa
AA Aa Aa aa
So here the ratio should be 1:1
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4.
Which type of population would be best suited for adapting to an environment that
undergoes a sudden change in climate?
a. A population with a higher numbers of males than females
b. A population with many phenotypes (physical characteristics)
C. A population with a high rate of emigration
d. A population with individuals that all express dominant traits.
What causes sickel cell anemia
Answer:
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin)
Explanation:
Answer:
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body
Explanation:
a yellow light in a blue light shine together on a white screen what color will the screen be.
Answer:
Green
Explanation:
Although all of the cells of a human develop from one fertilized egg, the human is born with many
different types of cells. Which statement best explains this observation?
a. Developing cells may express different parts of their identical genetic instructions.
b. Mutations occur during development as a result of envirnmental conditions.
C. All cells have different genetic material.
d. Some cells develop before other cells.
Answer:
a. Developing cells may express different parts of their identical genetic instructions.
Explanation:
Humans are multicellular organisms i.e. we possess many cells in our body. These cells increase as a result of division. Although all of the cells of humans develop from one fertilized egg (zygote), the human is born with many different types of cells because of a process called CELL DIFFERENTIATION.
Cell differentiation is a process in multicellular organisms where a cell becomes more specialized in function as it divides. The set of genes contained in each cell are not expressed simultaneously i.e. some genes are expressed while others are repressed. This is how cells with the same gene possess different functions. Therefore, according to this question, developing cells may express different parts of their identical genetic instructions to be of different types.
BIOLOGY HELP ASAP PLEASE. THANK YOU AND GOD BLESS
Karyotypes can be used to identify mutations in different forms of cancer, as you have seen in the HeLa and Philadelphia karyotypes. However, they are also useful in detecting other genetic abnormalities, such as Down syndrome (Trisomy 21). What would a karyotype of an individual with Down syndrome look like and what information would that provide to a geneticist?
Answer:
How do cells monitor DNA integrity?Cells monitor DNA integrity through check point processes that monitor the structure of the DNA as the cell cycle progresses.What went wrong with Henrietta Lacks’s cells?Henrietta’s cervical cells were infected with human papilloma virus, which mutated the DNA and made the cells cancerous.How does infection with human papillomavirus increase the risk of cervical cancer?Infection from human papilloma virus mutates the DNA of the cervical cells. Mutated cells increase the risk of those cells becoming cancerous.Philadelphia Karyotype. How do cells monitor DNA integrity?Cells monitor DNA integrity through check point processes that monitor the structure of the DNA as the cell cycle progresses.How are the chromosomes different in the cancer cells compared to normal cells?Chromosomes in cancer cells differ from those in normal cells because they usually have a larger
Chromosomes of cancer cells are often damaged mutated or missing parts, thus making them different from normal cells.How could these lead to different types of cancers?This can lead to different types of cancer, because when the genes replicate and cross over, the mutated genes are transferring. This can lead to ill functioning cells that lead to cancer.Essays Some types of cancer result from changes to individual genes, whereas others result from chromosome-level changes to the genome. Which of these types of cancer would you be able to detect by karyotype and why? Both would able to be detected by a karyotype.Because genes are on the chromosomes, when the individual genes are changed, it alters the appearance of the chromosome, which can be detected by a karyotype.When looking at the genome, one can see all the chromosomes making up the organism. If there was an alteration with the chromosomes, the karyotype would detect it. Karyotypes can be used to identify mutations in different forms of cancer, as you have seen in the HeLa and Philadelphia karyotypes. However, they are also useful in detecting other genetic abnormalities, such as Down syndrome. What would a karyotype of an individual with Down Syndrome look like, and what
would that provide to a geneticist? A karyotype for an individual with down syndrome would have an extra copy of a chromosome. This would help geneticists can view the abnormalities in the chromosomes, and help find out how that abnormality was caused.
Explanation:
A chromosome consists of mostly DNA and proteins with a small amount of RNA.
1. The four butterflies in the illustrations represent the offspring in the F1 generation.
Which statement is best supported by the phenotypes of these offspring?
Answer
Complete question:
1. The four butterflies in the illustrations represent the offspring in the F1 generation.
Which statement is best supported by the phenotypes of these offspring?
The F1 generation is composed only of malesTwo of the offspring in the F1 generation will not be able to reproduceThe F1 generation is the result of a dihybrid crossTwo of the offspring in the F1 generation will experience a spontaneous mutationAnswer:
The F1 generation is the result of a dihybrid crossExplanation:
Due to technical problems, you will find the complete explanation in the attached files
What does the circulatory system do for your body?
Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
According to the table what is the optimum temperature for the production of glucose in plants
Answer: I’m pretty sure it’s 30 degrees Celsius or 86 degrees Fahrenheit
If 20% of the long-tailed cats got their tails stuck in something and failed to reproduce, what would be the expected change in frequency of T in the next generation
Complete question:
Phenotype Genotype Number of Individuals
Long-tailed TT 260
Long-tailed Tt 160
Short-tailed tt 80
If 20% of the long-tailed cats got their tails stuck in something and failed to reproduce, what would be the expected change in frequency of T in the next generation
Answer:
The expected change in allelic T frequencies probably changes from 0.6 to 0.57 in the following generation.
Explanation:
Due to technical problems, you will find the complete question, answer and explanation in the attached files.
What is the DNA and rna
Answer:
Explanation:
DNA and RNA are both part of Nucleic acids. The monomer of it is nucleotides, and its function, is that it stores genetic information. They have similarities and differences.
Some similarities are....
They are both biomolecules, both are nucleic acids, they are both involved in the making of proteins, both contain genetic information.
Some differences are...
DNA = Double-stranded
RNA = Singer-stranded
DNA = The sugar moiety is deoxy ribose
RNA = Ribose is the main sugar
DNA = Thymine is always there, but uracil is never found
RNA = Pyrimidine components differ. Thymine is never found
DNA = It follows Chargaffs rule (since it's double stranded)
RNA = Doesn't follow Chargaffs rule (since it's single stranded)
I answered a question similar to this, so I know what to put.
Hope this helped!
2. The tremendous heat within the core and mantle causes convection cells to move within Earth.
(12.5 points)
true
False
Answer:
True
Explanation:
This is because as mantle convection slowly creep molecules that are warmer into the motion or movement in mantle cells, the cooler part of the rock move out of the mantle in the earth, convection currents continue to flow that carries heat into the mantle core. The mantle remain solid, the convection current that carry heat to the core, cause deformation of geologic structures on the mantle.
What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm? Is this organism human or animal?
Answer:
a. 1/2 b. The organism is an animal
Explanation:
a. What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm?
Medullary index = diameter of medulla/diameter of hair.
Given that diameter of medulla = medulla width = 2cm and diameter of hair = hair shaft width = 4cm,
Medullary index = diameter of medulla/diameter of hair = 2 cm/4cm = 1/2
b. Is this organism human or animal?
Since the medullary index = 1/2 > 1/3 (if it is ≤ 1/3 it is human hair and ≥ 1/2 it is animal hair), it is animal hair. So, the organism is an animal.
2. Humans have 46 chromosomes in each somatic cell. a. How many chromosomes does a child receive from its father
Answer:
24
Explanation:
How much of Earth is covered in water?
A. 95%
B. 75%
C. 25%
D. 50%
9 MBO
If the amount of pollution is the same in the ocean where the fish are being caught, why
might some fish have more of this toxin than others?
Answer:
Because they might be taking in a higher concentration of the toxin through food or their environment or others could just be older meaning theyve ingested more of the toxin overtime
Explanation:
The level of toxin in fishes that lives in the area of the same pollution may differ due to the ability to consume toxins.
What do you mean by Toxins?Toxins may be defined as a poisonous substance that is a specific product of the metabolic activities of a living organism and is usually very unstable, notably toxic when introduced into the tissues, and typically capable of inducing antibody formation.
While living in the area or habitat of the same pollution, still some fishes have more of this toxin than others. This is because these fishes have the ability to consume toxins from food resources that are present in the same habitat. While some fishes consume high toxins, but in results, they do not have the ability to resist in the high level of toxins, so they get eliminated or died.
Therefore, the level of toxin in fishes that lives in the area of the same pollution may differ due to the ability to consume toxins.
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Factors that affect drug absorption include: (Choose the best answer.) Group of answer choices Protein-binding properties of the drug molecule Ability to chew and swallow Liver enzyme activity Lipid solubility of the drug
Answer:
The Factor that most affects drug absorption s the Lipid solubility of the drug
Explanation:
For a drug to accomplish its pharmacological function, it needs to suffer absorption mechanisms.
Most drugs, those that do not act locally, need to be correctly concentrated in their action sites or target sites. The first step is absorption.
This involves the obligated pass through the semipermeable plasmatic membrane to finally get in the blood. In blood, the drug moves, distributes, metabolizes, and the unaltered molecules are excreted.
There are different mechanisms in which drugs can cross the membrane that depends on the drug type. Depending on the effects of these mechanisms, there will be a more or less concentrated drug at the target sites.
