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Dafna1 [17]
3 years ago
7

In Figure 33–6, what structure is labeled A? What is the role of the delicate network of

Biology
2 answers:
ryzh [129]3 years ago
7 0

Answer:

The structure labelled as A must be alveoli.

Explanation:

Alveoli or alveolar sac are present in lungs.They are also called as air sacs. The alveoli of lungs provide a large surface area for gaseous exchange. The number of alveoli in human lungs has been estimated to be approx. 300 million. The rich network of capillaries surrounding them help in exchange of gases. Both alveolar wall and capillary wall are made of squamous epithelium.  It allows the exchange of gases according to their partial pressure differences.

BabaBlast [244]3 years ago
4 0
Heyo the answers to the multiple choice are A B B A C A C D A C B D D B B C C A  D B I'll have the essay questions and fill in the blanks after my test is graded or you can just look them up.
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Answer:

Two gametes end up with 30 chromosomes, one gamete will have 31 and one will have 29.

Explanation:

During meiosis, a single diploid cell divides into four haploid cells with half the chromosome number than the parent cell.

During meiosis I, homologous chromosomes separate and the chromosome number in the two daughter cells goes down by half. During meiosis II, the "sister" chromatids separate, and the chromosome number in the respective daughter cells remains the same.

Non-disjunction of a single dyad in meiosis II causes that one of the daughter cells will have an extra chromosome, and another will be lacking one. The two other gametes will be normal.

I drew a simple example of what would happen during meiosis of a 2n=4 cell if there was non-disjunction in a single dyad during meiosis II.

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