Which of the following is required for the secretion of testosterone?

a. Sertoli cells
b. FSH
c. Leydig cells
d. GnRH


Ans: d. GnRH

Biology & Microbiology

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Organisms in the genus Pseudomonas are resistant to quats.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Which of the following occurs in all species of living organisms and may lead to an increase in genetic variation?

(A) Mutations in the genome (B) Crossing-over in meiosis (C) Random assortment of chromosomes (D) Alternative splicing of mRNA

Biology & Microbiology

Animals that are warm blooded, have body hair, and produce milk for their young are grouped in the class

a. amphibia b. mammalia c. aves d. reptilia

Biology & Microbiology

Veins always carry blood:

A) away from the lungs. B) toward the heart. C) toward the capillaries. D) away from the heart.

Biology & Microbiology