Which of the following is contained in the semen?
a. a substance that raises the pH in the female reproductive tract
b. a substance that triggers contraction of muscles in the female reproductive tract
c. a fast-acting enzyme that breaks down the semen clot
d. a slow-acting clotting enzyme
Ans: a. a substance that raises the pH in the female reproductive tract
You might also like to view...
___________, such as sea stars, are invertebrate members of the deuterostome lineage. Fill in the blank(s) with the appropriate word(s)
The dark middle layer of the eye that prevents
the scattering of light is the a. fovea. b. retina. c. sclera. d. choroid. e. cornea.
A population that is in genetic equilibrium is said to ____
a. have an equal number of homozygotes as heterozygotes for a given trait b. deviate from the Hardy-Weinberg law c. require genetic testing for estimation of allele frequencies d. lose genetic variation with each generation e. have an allele or alleles that remain constant generation to generation
The low pH of lysosomes is established by
A) acid hydrolases. B) ATP-dependent proton pumps. C) ?-glucuronidases. D) catalases. E) superoxide dismutases.