You are studying reproduction in a species of frog. Say there was a mistake in meiosis such that all the gametes produced by two individuals are diploid rather than haploid. Two of these gametes fuse. This zygote is:
A. haploid.
B. diploid.
C. tetraploid.
D. octoploid.
C
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In the blood clotting cascade mechanism, which specific enzyme catalyzes the conversion of fibrinogen to fibrin?
A. renin B. thrombin C. albumin D. angiotensin E. catalase
A wild duck needs a steady supply of energy to be able to fly for hours. Domesticated chickens rarely fly. As a result, you would expect to find in the breast muscles of wild ducks than in domesticated chickens.
A. less cytoplasm B. more Golgi apparatus C. fewer mitochondria D. more mitochondria E. more cytoplasm
Your textbook, and many (but not all) paleoanthropologists, refer to a species more closely related to humans than to chimps as a(n) ________
Fill in the blank(s) with correct word
Which one of the following functional groups increases the solubility of organic compounds in water?
A. -SH B. -COOH C. -COH D. -NH2 E. all of the above