Which best describes the main role of nuclei acids in living things?

Answer:

its C option that mitosis is a process by which a parent cell divides into two seperate cells and is responsible for limiting genetic variation.

Explanation:

The somatic cell division resulting in two daughter cells is called mitosis. The parent cell divides to form cells and limits genetic variations. Thus, option C is correct.

Mitosis has been defined as cell division that occurs in all somatic cells and results in genetically identical daughter cells that have been known to have the same ploidy as the parent cell.

The nucleus and the other organelles of the cell divide and undergoes division to form two new cells with an equivalent amount of the material. They separate the cells equal genetic material.

They limit the genetic variation as they do not undergo recombination and crossing over, unlike the meiotic division. They are important for the growth, repair, and continuity of life.

Therefore, option C. miotic division results in two daughter cells.

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In this dihybrid cross, we have two double heterozygous parents. Parent 1 (PpRr; Purple flowers, a Round seeds) and prent 2 (PpRr; Purple flowers, a Round seeds), to obtain the possible gametes we must combine each allele as it follows:

As each parent is a double heterozygous the gamete combination will be the same, having four gametes (PR, Pr, pR, pr) for parent one and four gametes (PR, Pr, pR, pr) for parent2.

Parent plant 1

Gamete 1: PR

Gamete 2:Pr

Gamete 3:pR

Gamete 4:pr

Parent plant 2

Gamete 1:PR

Gamete 2:Pr

Gamete 3:pR

Gamete 4:pr

Answer:

When water evaporates, the salt is left behind. The fresh water vapor that condenses into clouds, with many of which drift over land.

Explanation:

Answer:

because the oceans covers 70% of earths surface. land being the other 30%

Answer:

a living organism that shapes its environment

Explanation:

hope this helps

Answer: Immunity

Explanation: Antibiotics can be highly effective in treating bacterial infections, as long as the bacteria have not developed immunity to the antibiotics.

Answer:

Explanation:

Aerobic respiration is the process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multistep process that produces roughly 36 ATP. ... Aerobic respiration is the process of breaking down the food that comes into a cell using oxygen to help power that process.

Answer: I hope this is the right answer you were looking for, if not I'm sorry

Explanation:

The first organic molecules formed about 4 billion years ago. This may have happened when lightning sparked chemical reactions in Earth's early atmosphere. RNA may have been the first organic molecule to form as well as the basis of early life.

Answer:

A I'm pretty sure cause t hff sts really the only one that makes sense

Answer:

the answer is letter A

Explanation:

The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.

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Answer:

Powerhouse of the cell

Explanation:

it helps all other cells survive and regenerate in the membrane

GGTTAACT is the complement of DNA sequence CCAATTGA.

A sequence of bases in a nucleic acid called a complementary sequence can be used to match base pairs to create a double-stranded structure. For instance, G-T-A-C is the complementary sequence to C-A-T-G, where each letter represents a different DNA nucleotide.

Every DNA sequence has a counterpart sequence running in parallel since DNA has two strands. Adenine (A) is always coupled with Thymine (T) in the complementary sequence, while Cytosine (C) is always paired with Guanine (G).

Natural complementary DNA plays a crucial role in the production of new DNA copies and has emerged as a key experimental tool. The two strands of DNA are unraveled from one another during replication. Each strand is replicated twice, one by a DNA polymerase molecule that runs the length of each strand.

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Answer:

The correct answer is - C-terminal

Explanation:

Polypeptide chains are nothing but the linked amino acid sequences together which is takes place with the help of mRNA, ribosome, and tRNA in a living cell or organism. Polypeptide chain has two ends with two functional groups a carboxyl group end and an amino group end of the polypeptide chain.

The next amino acid added to the carboxyl group end of the polypeptide chain with the bond known as peptide bond and the reaction known as a condensation reaction and a molecule of water is released.

Answer:

A. mitochondria

Explanation:

The mitochondria makes energy for the animal cell. The mitochondria organelle is known as the "power house of all cells". It makes energy for the cell.

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Scientific names are composed of two parts, genus, and specific epithet, this last one is the one that differentiates the species contained in a genus so in the present case we have the genus Phoebis, but not the specific epithet, therefore the correct answer is D, there is not enough information.

Answer:

against the concentration gradient

Explanation:

1. I used 1 gallon of water each time I washed my hands. This means that I used 7 gallons of water in a week and 365 gallons of water in a year.

2. I used 1 cup of water each time I brushed my teeth. This means that I used 7 cups of water in a week and 365 cups of water in a year.

In science, a hypothesis is an educated guess about how things work. It is a statement that can be tested to see if it is true. A hypothesis is not a fact, but it is a starting point for scientific inquiry.

3. The Florida site suggests that we all cut our water use by 10%. To cut my water use by 10% for washing my hands, I could turn off the faucet while I am lathering my hands with soap. To cut my water use by 10% for brushing my teeth, I could turn off the faucet while I am rinsing my mouth. I could also brush my teeth with less water.

4. My showers were each 10 minutes long. If I cut two minutes off each shower, I would save 2 gallons of water each time I shower. This would save me 140 gallons of water in a year. This is a feasible option for me because I do not need to shower for 10 minutes to get clean.

5. I do not take baths.

6. I could help conserve water for my entire household by fixing any leaks in the pipes. I could also install low-flow faucets and showerheads. I could also encourage my family to take shorter showers and to turn off the faucet while they are brushing their teeth.

7. Some suggestions from the course activity website that my family could follow to save water include:

8. My hypothesis was that I would use more water than I actually did. My actual water use was much lower than I expected. This is because I took steps to conserve water, such as turning off the faucet while I am lathering my hands with soap and while I am rinsing my mouth. I also brushed my teeth with less water.

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Answer:

1) This happens in the nasal cavity or nostrils. The cilia (nasal hairs) are the ones responsible for this in which the particles are filtered. Then in the back of the throat is where the nasal cavity and mouth meet is the pharynx.

2) This is the correct function. There are four stages of gas exchange that occur when oxygen is breathed into the body: ventilation, pulmonary gas exchange, gas transport, and peripheral gas exchange. The processes of gas inhalation, exhalation, exchange at the alveoli, transportation to the blood, and subsequent diffusion through different cellular membranes situated in body tissues are described. The lungs contain millions of alveoli, which are surrounded by capillaries. Each bronchiole ends with a collection of tiny air sacs known as alveoli. Capillaries, which are very small blood arteries, surround alveoli. These air sacs are filled with oxygen-rich air from the air you breathe in. The exchange of gases takes place here.

3) It travels down both, not just one.  The air travels passed the larynx and into the trachea. The trachea is divided into two tubes which are known as the bronchial tubes. The left one leads to the left lung and the other to the right lung. From here the air is brought to even smaller tubes known as bronchioles.

4) Air enters from the outside during inhalation to either these two openings: nostrils or external nares. The cilia serve the purpose of capturing large inhalation particles. The internal nares are the openings between the nasal cavity and the pharynx. Hence, air enters into the nasal cavity.

5) From the pharynx, air flows through the glottis to the trachea and the cycle continues. The glottis and two or three other cartilages form the larynx, a simple tubular structure in most reptiles.

Thanks.

Answer:

The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.

Explanation:The right side of your heart receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your heart receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body.

When one phosphate group is removed by rupturing a phosphoanhydride bond during the process known as hydrolysis, energy is released and ATP is transformed into adenosine diphosphate.

Adenosine diphosphate (ADP), a version of the nucleotide with only two phosphates, is created when the outermost phosphate of ATP is removed to give energy. By adding a phosphate group to another molecule, ATP can change another molecule to power biological processes (a process called phosphorylation).

The ATP molecule splits off one of its three phosphates when a cell has to expend energy to complete a task, resulting in the formation of ADP (Adenosine di-phosphate) + phosphate. It is now possible for the cell to use the energy that was previously bound to that phosphate molecule to carry out its operations.

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Answer:

c. A salinity of less than 1%

Explanation:

Answer:

3 p 1 w

Explanation:

The possible phenotypes of the offspring of heterozygous parents are 3 purple and 1 white. Thus, the correct option for this question is A.

Phenotypes may be defined as the expression of genotypes in the form of traits. In a more simple sense, phenotypes may also be characterized as the morphology or physiology which arises due to the combination of alleles.

According to the scenario, when both the parents with heterozygous genotypes (Pp × Pp) are crossed each other. They produce offspring with the genotypes PP, Pp, Pp, and pp. The genotypic ratio is 1:2:1, while the phenotypic ratio is 3:1 (Purple: white).

Therefore, the possible phenotypes of the offspring of heterozygous parents are 3 purple and 1 white. Thus, the correct option for this question is A.

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High soil moisture causes transpiration to increase by increasing the water potential of the plant, increasing the relative humidity of the atmosphere, and increasing the turgor pressure of the plant cells. Here high soil moisture is the correct answer.

Transpiration is the loss of water vapour from the surfaces of a plant or a leaf. A condition that causes transpiration to increase is high soil moisture. Plants get water from the soil through their roots. High soil moisture increases the water content of the soil and the water potential of the plant. The water potential of the plant is the measure of the pressure required to extract water from the plant. High soil moisture reduces the water potential gradient between the soil and the plant.

The high soil moisture creates a favourable condition for transpiration because it increases the relative humidity of the atmosphere around the plant. Transpiration occurs because the air surrounding the leaf is drier than the air inside the leaf. When the relative humidity of the atmosphere is high, the rate of transpiration increases.

The high soil moisture also increases the turgor pressure of the plant cells. Turgor pressure is the pressure that water exerts on the cell wall of the plant. The turgor pressure is what keeps the plant cells rigid. When the turgor pressure is high, the rate of transpiration increases. Therefore high soil moisture is the correct answer.

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An air mass that formed over the North Pole would differ from an air mass that formed over a warm ocean in several ways.

Air masses are large bodies of air with similar characteristics that form over a specific region of the Earth's surface and can travel long distances before encountering a different air mass that alters its characteristics. The characteristics of an air mass depend on the region over which it forms.

The air mass that forms over the North Pole would be cold and dry due to the absence of sunlight and the Arctic's high latitudes. Arctic air masses are characterized by a high pressure system that circulates air clockwise. This rotation traps cold air over the region and prevents it from mixing with the surrounding air masses.

The air mass that forms over a warm ocean would be warm and moist. The ocean surface warms the air above it, and the air acquires moisture through evaporation. The warm air then rises, causing low-pressure areas over the ocean and pulling in moisture-laden air from surrounding regions. This moist air mass travels over land, and its temperature decreases, causing it to lose its moisture content and form precipitation.

The moisture content in this air mass would be high, causing it to be humid. Air masses interact with each other and cause changes in weather patterns and climate. They also play a vital role in the Earth's energy balance and regulate temperature and precipitation patterns.

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Answer:

the cell will become turgid due to tge cell wall

Explanation:

when a plant cell is placed in distilled water the water will move in the solution inside the cell is hypertonic to the distilled water serrounding the cell but it will not burst it producr turgor pressure keeping the plant upright

if a plant cell is placed in distilled water, and distilled water has a very low concentration of solutes the cell will become turgid due to the cell wall, hence option B is correct.

This is because distilled water has a very low concentration of solutes and a high concentration of solvent, making it a hypotonic solution in comparison to the intracellular environment.

To put it another way, we can say that the solute concentration of When a plant cell is placed in distilled water, it becomes turgid.

This is due to the fact that it osmotically absorbs water from the hypotonic distilled water, causing the cytoplasm of the plant cell to enlarge and firmly press up against the cell wall.

Therefore, distilled water has a very low concentration of solutes, so cells will become turgid.

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Answer:

O Negative Reinforcement

Explanation:

Negative reinforcement removes something problematic as a reward. Thus, wearing a coat when it colds removes the negative thing (cold) when person walks out

Answer:

The correct answer is option - 1. If passage through the placenta is adversely affected by fetal disease. and 4. If rapid drug effects are required.

Explanation:

Normally the drug that is provided and administrated to the fetal is through the placenta of the mother. The direct delivery of medicine can be dangerous. However, with the advancement of the medical technology direct fetal drug administration is possible and it assists in the rapid uptake of the drug by the fetus.

If the fetus requires a rapid drug effect it can be provided by direct drug delivery. Also when the placental is not working properly and affected by the disease it is recommended to provide the fetus with the drug with the help of direct delivery.

Thus, the correct answer is : 1. If passage through the placenta is adversely affected by fetal disease. and 4. If rapid drug effects are required.

The process most similar to a child eating dirt and being exposed to pathogens is called immune priming. Immune priming is when a person is exposed to a weak antigen or pathogen, stimulating a response from their immune system that will help them better respond to a secondary, stronger exposure to the pathogen.

Antigen-specific T helper cell precursors initially come into touch with an antigen during priming. The ensuing interaction between T helper cells and B cells, which triggers the production of antibodies, is crucial. [1] When antigen is delivered to naive lymphocytes in an immunogenic state, priming of those cells takes place (capable of inducing an immune response). The primed cells will then develop into memory cells or effector cells, respectively, that can mount a stronger and quicker response to subsequent and forthcoming immunological threats. [2]

Dendritic cell antigen presentation is necessary for priming naive T cell activation. Naive CD8 T cells that have been primed produce cytotoxic T cells that can kill pathogen-infected cells directly. According on the sort of signals they receive, CD4 cells can grow into a wide range of effector cell types.

Co-receptors of TCRs (T cell receptors), CD4 cells help TCRs communicate with antigen-presenting cells. The antigen-presenting MHS class II molecules are specifically targeted by the TCR complex and CD4 cells. These CD4 cells' extracellular D1 domain interacts with the MHC Class II 2 region to form a bond. Because of this interaction, the tyrosine kinase Lck is able to phosphorylate ITAMs (immunoreceptor tyrosine activation motifs), which are attached to the cytoplasmic tail of CD4 on the cytoplasmic domains of CD3. The T cell receptors' ability to produce messages is enhanced by this.

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The two methods that allow fish to maintain water balance in saltwater are pumping out salt through the gills and absorbing water into the body by osmosis.

In saltwater, the concentration of dissolved salts is higher in the surrounding water than in the fish's body cells. To maintain water balance, fish have developed two main methods:

1. Pumping out salt through the gills: Fish possess specialized cells in their gills that actively pump out excess salts from their bodies. This process helps maintain a lower salt concentration within the fish's body, preventing dehydration and maintaining water balance.

2. Absorbing water into the body by osmosis: Osmosis is the movement of water from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. Fish have a protective layer of skin that allows water to be absorbed into their bodies while preventing the entry of excessive salts.

By absorbing water through their skin, fish replenish the water lost to the surrounding saltwater, helping to maintain their internal water balance.

These two mechanisms work together to enable fish to survive in saltwater environments. By actively pumping out salts and absorbing water, fish can regulate their internal salt concentration and prevent dehydration, ensuring their overall water balance is maintained.

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