Sometimes postmenopausal women are given a prescription for which of the following to help them maintain their bone calcium?
A) calcitonin B) parathyroid hormone
C) insulin D) thyroid hormone
Answer: A
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The ________ projection illustrates saccharides as linear, whereas the ________ projection suggests the spatial relationships of saccharides.
Fill in the blank(s) with the appropriate word(s).
Which type of plant tissue is considered primarily photosynthetic?
a. vascular tissue b. dermal tissue c. ground tissue d. root tissue
When nitrate is reduced to dinitrogen gas (N2), nitrogen is removed from the ecosystem and returned to the atmosphere through a series of reactions collectively known as ________.
A. denitrification B. nitrogen fixation C. anammox reaction D. All of the choices are correct.
Sea cucumbers belong to the class Echinoidea
Indicate whether the statement is true or false