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Pani-rosa [81]
3 years ago
14

Why do the walls of the capillaries and air sacs have to be thin

Biology
1 answer:
dmitriy555 [2]3 years ago
7 0
The alveoli are lined with mucus and are surrounded by a network of blood capillaries. They have very thin walls for gases to be absorbed through.Carbon dioxide diffuses from the blood into the alveoli.
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2. If a nucleus has 8 chromosomes, how many chromosomes will be present after Telophase I? 3. What advantage does crossing-over
Brums [2.3K]

Answer:

Telophase I: 8 chromosomes composed of two sister chromatids  

Crossing over refers to the mechanism of recombination, this process being characterized in that increases the genetic variation

Spermatogenesis refers to the mechanism of formation of male gametes (sperms), while oogenesis is the process of formation of female gametes (oocytes)

Explanation:

Telophase I is the final step in meiosis I. During telophase I, the nuclear membrane is formed around the decondensed set of chromosomes and the nucleoli reappear.  

Spermatogenesis refers to the process by which haploid male germ cells (sperms) are generated within the seminiferous tubules in the testis, while oogenesis refers to the process of differentiation of the female egg cells (ova or oocytes) in the ovaries. Spermatogenesis is known to produce small and motile spermatic cells, while oogenesis is known to produce bigger non-motile oocytes.

4 0
3 years ago
As the Sun moves throughout the day, some plants can follow it. This is called _____.
adell [148]
Heliotrophism is the answer to your question.
4 0
3 years ago
What is the difference in the beginning between primary succession amd secondary succession
lianna [129]
Primary succession is when, for example, a volcano explodes and there is nothing left and even the soil is ruined. It would take at least a hundred years for the land to be like it was before the volcano erupted. Secondary succession is when, for example, a wild fire happens but the soil is not ruined. It would take at least 25-50 years for the land to be like it was before the fire.

4 0
3 years ago
Vagal stimulation during suctioning can contribute to which conditions? select all that apply.
Fynjy0 [20]

Answer;

-Bradycardia

-Heart block

-Asystole

Explanation;

-Tracheal suctioning can cause a vagal response. This stimulus influences the electrical system of the heart, potentially leading to decreased heart rate (bradycardia), heart block, asystole, or other dysrhythmias.

-Bronchospasm would not be induced by this type of stimulus. Vagal stimulation can result in hypotension, not hypertension.

5 0
3 years ago
which example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation?
KATRIN_1 [288]

An example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation is option B: replacement of a polar amino acid with another polar amino acid at the protein's surface.

A frequent and well-known example of a missense mutation is the blood condition sickle-cell anemia. Missense mutations exist in the DNA at a single location in sickle-cell anemia patients. A different amino acid is required in this missense mutation, which also alters the overall structure of the protein. Similarly, replacement of a polar amino acid by another polar Ami no acid at the protein's surface is a missense mutation causing change in a single site.

A neutral mutation is one whose fixation is unrelated to natural selection. Therefore, the independence of a mutation's fixation from natural selection can be used to define the selective neutrality of a mutation.

To know more about mutations, refer to the following link:

brainly.com/question/20407521

#SPJ4

Complete question is:

Which example of a missense mutation in a protein-encoding gene would most likely be a neutral mutation?

a) Replacement of a polar amino acid with a nonpolar amino acid at the protein's outer surface

b) Replacement of a polar amino acid with another polar amino acid at the protein's surface

c) Replacement of a polar amino acid with another polar amino acid in the protein's interior

d) Replacement of a polar amino acid with a nonpolar amino acid in the protein's interior

3 0
1 year ago
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