Which of the following maintains the endometrium in preparation for pregnancy?
a. oocytes
b. LH
c. estrogen
d. FSH
e. progesterone
ANSWER: e
Biology & Microbiology
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In flowering plants, how many sperm cells are typically produced from each microspore mother cell?
a. one b. two c. three d. four e. eight
Biology & Microbiology
Which of the following is a grouping of related genera?
a. family b. phylum c. species d. class e. order
Biology & Microbiology
Air enters the lungs when the diaphragm ________.
A. contracts B. relaxes
Biology & Microbiology
The principle sites of amphibolic interaction occur during
A. Krebs cycle and electron transport system. B. fermentation and glycolysis. C. fermentation and Krebs cycle. D. glycolysis and photosynthesis. E. glycolysis and Krebs cycle.
Biology & Microbiology