Which process helps gas exchange to occur?

Answers

Answer 1
Answer: respiration is a process of exchanging gas.

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Examine the image. Then use the drop-down menu to choose the correct order for the relative age of the features from oldest to youngest -answer “b,w,e,q,k

Answers

Answer:

b w e q k

Explanation:

2 answer

Answer: B, W, E, Q, K

Explanation:

After cell division each daughter cell hasa.a lower surface area/volume ratio than the parent cell
b.a higher surface area/volume ratio than the parent cell
c. more DNA in its nucleus than the parent cell
d.less DNA in its nucleus than the parent cell

Answers

The surface area to volume ratio will be higher as compared to the parent cell after cell division. Hence, option B is correct.

Further Explanation:

Cellular division is known to be the process through which the parental cell segregates into two or more daughter cells. This process generally occurs as a segment of a larger cell cycle. It comprises of 2 main stages, interphase and M-phase. Interphase is further segregated into:

  1. G1 phase wherein the cell prepares itself for the upcoming events.
  2. S phase is the phase where DNA synthesis occurs
  3. G2 phase is the phase wherein the cell gets ready for the M phase.  

M phase or mitotic phase is the next stage after interphase and is segregated into 4 phases:

  1. Prophase is the first event which occurs and in this the nuclear envelope disappears, mitotic spindle formation starts, and chromosome condensation begins.  
  2. Metaphase is wherein the alignment of chromosome occurs on the equatorial plate.  
  3. Anaphase is the phase wherein the chromosomes segregate towards the opposite ends
  4. Telophase is the final stage and division of the two daughter cells is completed.  

During cellular division, the cell segregates into 2 daughtercells and as the cell becomes larger, the volume elevates rapidly as compared to its surface area. Hence, option B is correct. The reduction in the cell’s ration of the volume to surface area makes it difficult for the cell to transport the required substances in and move out the waste products quickly enough for the cell to survive.

Learn More:

  1. Learn more about effects of vigorous exercise on cardiorespiratory system brainly.com/question/1209683
  2. Learn more about the structure of epithelium and connective tissue brainly.com/question/4557690
  3. Learn more about secondary function of the lymphatic system brainly.com/question/2909254

Answer Details:

Grade: High school

Subject: Biology

Chapter: Cell Division

Keywords:

Cell division, cellular division, interphase, cell cycle, metaphase, M phase, G1 phase, prophase, G2 phase, telophase, S phase, anaphase, surface area, volume, ratio.

Final answer:

OPTION A.

After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. This is due to the division resulting in two smaller cells with same DNA content. This increased ratio is beneficial for the exchange of material across cell membrane.

Explanation:

After cell division, each daughter cell has a higher surface area/volume ratio than the parent cell. When a cell divides, it splits into two smaller cells, reducing the volume but not reducing the surface area in the same proportion. This results in each daughter cell having a larger surface area relative to its volume. This increased ratio is important because it allows for more efficient exchange of nutrients and waste products across the cell membrane.

The amount of DNA in each daughter cell is the same as in the parent cell because during cell division, the DNA is copied and then distributed evenly between the two resulting cells. Therefore, option c and d are incorrect.

Learn more about Cell Division here:

brainly.com/question/29773280

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A population of rabbits lives in a forest. The habitat features many small spaces for hiding. Over many generations, the average size of the rabbits gets smaller and smaller. What type of selection is this?

Answers

Answer: Directional Selection.

Explanation:

This process can be defined as the positive selection in which one phenotype is selected over the other phenotype, causing the allele frequency to shift towards the other phenotype.

The allele favored by directional selection is advantageous. There is a increase in the rate of reproduction and chances of survival.

Here, the population of rabbits are decreasing in size over a period of time because they adapted the burrows to live in. Gradually small size of the rabbits were favored.

This is an example of directional selection.

In What stage of the cell cycle does dna replication occur?

Answers

Answer:

The correct answer is- Synthesis(S) phase

Explanation:

Interphase is the phase where cells spend most of their time. It is known as the resting phase and contains 3 stages called G1, S, and G2 phase. In G1 phase cells grow in size and produce those enzymes which are required for DNA replication.

In the synthesis phase, the DNA is replicated and gets doubled. This event is very important in the cell cycle because it allows each cell produced after cell division to take an equal amount of genetic material which is identical. Therefore in the cell cycle DNA replication occurs in the synthesis phase.

The interphase of cell cycle has 3 stages: G1, S, and G2 phase. The replication of the DNA occurs during the S phase. In the G1 phase cell grows and prepares for DNA replication, while in G2 phase cell prepares itself for cell division.

Why is pollution never a strictly local problem

Answers

Because there are many types of pollution. 
Air pollution, water pollution, etc.
The reason it is never local is because it's a chain reaction to the environment.
Example 1:
China has the worst air pollution in the world from factories and cars. The smoke has a depleting effect on the O-zone layer which protects humans from the sun's harmful UV rays. Also, without the protection of the o-zone layer, global warming is increased (yes, it's real) and glaciers begin to melt raising water levels and so forth. So even though the smoke is all the way in China, it affects all of us living on earth.
Example 2:
Let's say there is a oil spill in the ocean which potentially kills or endangers many organisms, like fish. Even though the oil spill was only in that part of the ocean, it affects all the animals because of something called the food chain. If all of a certain fish or animal dies out and that was another animals primary source of food, then it messes up the chain.

What is scientific consensus

Answers

The opinion of scientists in a particular field with majority of them supporting a concept, belief or a suitability of a question lead to scientific consensus. The consensus may or may not be proved true  at the end of the research but at their primary level they gain maximum support as they are based on some evidence or observation. Overall scientific consensus can be stated as convergence of high quality evidences leading to same conclusions.

Scientific consensus is the collective judgment, position, and opinion of the community of scientists in a particular field of study. Consensus implies general agreement, though not necessarily unanimity.