The evolution/development of the lung is an example of cellular specialization.

Question

The evolution/development of the lung is an example of cellular specialization. This refers to the fact that: a) all the ectoderm cells remain the same b) all cells derived from the endoderm secret collagen c) the cells of the endoderm from notochord d) genes are activated or suppressed in the stem cells from the original endoderm germ layer causing them to become stem cell that produce the cells of the alveolus of the lung e) genes are not involved in this function "O is a radioactive isotope of oxygen. If green plants were incubated with "o- labeled water, what radioactive molecule would appear after the plants were exposed to light? a) carbon dioxide. b)oxygen c) ATP d) Glucose e) ethanol.

Explanation / Answer

Que 40

Ans:

The evolution /development of the lung is an example of cellular specialization. This refers to the fact that: b) all cells derived from the endoderm secret collagen.

Explanation:

- The derivatives or portion of the body, that develops from the endoderm germ layer include parts of the digestive tract, the respiratory tract, the urinary tract and several internal organs.

- The inner epithelial lining of most of the gastrointestinal tract is derived from the endoderm.

- Hence, correct option is: b).

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