QUESTION 1 One of the body\'s responses to low levels of calcdum kons in the bod

Question

QUESTION 1 One of the body's responses to low levels of calcdum kons in the body is to release parathyroid hormone (PTH) This iniates which of the following processes? O the activation of osteoblasts, which deposit the mineralized bone matrib the activation of osteoclasts, which dissolve the mineralized bone matrix the activation of osteoblasts, which dissolve the mineralized bone matrix O the activation of osteoclasts, which deposit the mineralized bone matrix QUESTION 2 Which of the following is a feature that is shared by all amniotes? O oviparity O viviparity O sexual reproduction

Explanation / Answer

1.

The parathyroid hormone stimulates osteoclasts to undergo demineralization. Thus, the osteoclasts release calcium ions from the bone and results in increased levels of calcium ions in blood.

Thus, the correct option among the following is 2nd one.

2.

Amniotes are a clade of tetrapod vertebrates, which include reptiles, birds, and mammals. Among these reptiles and birds lay eggs, while mammals mostly give birth to egg ones. Hence, the common feature among the amniotes is internal fertilization.

Thus, the correct option among the following is 3rd one.

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