The reptiles, which include lizards, snakes, alligators, crocodiles, turtles, and birds, evolved from the _____.

A) reptiles.
B) amphibians.
C) vertebrates.
D) both A and C
E) both B and C


Ans: B) amphibians.

Biology & Microbiology

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Mendel's famous experiments were done using which plant?

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Efficiently translated mRNAs tend to be stable in the cytoplasm; those that are poorly translated tend tobe rapidly degraded. Which of the following is not a step in the pathway for mRNA degradation?

A. targeting of upstream ORFs for nuclease binding B. removal of the poly(A) tail C. removal of the 5' 7-meG cap D. binding of mRNA by 5'-3' and 3'-5' RNA exonucleases

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Red blood cells, also known as __________, contain the hemoglobin that functions in rapid transport of oxygen. Fill in the blank(s) with the appropriate word(s)

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Which of the following extraembryonic membranes

forms fingerlike projections that become part of the placenta? a. amnion b. yolk sac c. chorion d. allantois e. none of these

Biology & Microbiology