In men, ______ stimulates secretion of testosterone by the ______ cells.

A. LH/pituitary
B. LH/interstitial
C. FSH/pituitary
D. FSH/interstitial


Answer: B. LH/interstitial

Biology & Microbiology

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All of the following are involved with chewing the cud EXCEPT

a. regurgitation of food. b. increased breakdown of food. c. exposure of new surfaces for rumen microbes. d. incorporation of more oxygen into the food.

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Chemical cues that help guide a developing pollen tube toward an ovule are released by the ____.

a. antipodal cells b. synergids c. egg d. central cell e. sperm

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Multicelled fungi live as a mesh of threadlike filaments collectively called ____

a. hyphae b. hypha c. mycelium d. yeast e. fruiting bodies

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A key step in the evolution of vascular plants was the ability to produce ____, a strengthening polymer in the walls of

cells that function for support and conduction a. cutin b. chitin c. lignin d. actin e. cellulose

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