Which hormone is responsible for the release of follicle stimulating hormone and luteinizing hormone?
a. oxytocin
b. estrogen
c. gonadotropin-releasing hormone
d. testosterone
c. gonadotropin-releasing hormone
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A graduate student is studying the distribution of auxin in roots and stems exposed to sunlight
He notices that more auxin collects in the sides of stems and roots that are not exposed to light; however, the effects of this distribution are very different. Why? Select all correct choices. A. Auxin prevents cell elongation in the shaded cells of stems. B. Auxin (via ethylene) promotes cell elongation in the shaded cells of roots. C. Auxin (via ethylene) prevents cell elongation in the shaded cells of roots. D. Auxin promotes cell elongation in the shaded cells of stems.
Many fully differentiated plant cells are totipotent, meaning that they ____
a. will grow roots if they touch the ground b. will perform photosynthesis if exposed to sunlight c. can fertilize an egg d. have the potential to form a whole, fully-functional plant e. can undergo meiosis
An example of a fat-soluble vitamin is ____
a. vitamin C b. thiamin c. riboflavin d. vitamin K e. folic acid
The theory that earthquakes, floods, and other natural disasters cause extinctions of some species while leaving others unharmed is ________
Fill in the blank(s) with correct word