Which cells in the testes produce testosterone?
a. Sertoli cells
b. luteinizing cells
c. glycoprotein cells
d. interstitial cells
e. sperm cells
D
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What is the advantage of enhanced biological phosphorus removal (EBPR) over chemical precipitation?
A) Chemical precipitation produces sludge containing arsenic. B) EBPR removes significantly more phosphorus than chemical precipitation. C) Significantly less sludge is produced by EBPR compared to chemical precipitation. D) EBPR is a more stable process.
Thermotogae can grow anaerobically on which of the following?
A. Protein digests and carbohydrates B. Cellulose C. Methane and methanol D. Lignin
Primary cilia have a(n) ________ function and typically display a ________ structure
A) axonal; 9+2 B) motile; 9+0 C) motile; 9+2 D) sensory; 9+0 E) filopodial; 9+4
Males are more often affected by sex-linked traits than females because
A) males are hemizygous for the X chromosome. B) male hormones such as testosterone often exacerbate the effects of mutations on the X chromosome. C) female hormones such as estrogen often compensate for the effects of mutations on the X. D) X chromosomes in males generally have more mutations than X chromosomes in females. E) mutations on the Y chromosome often exacerbate the effects of X-linked mutations.