The most abundant mineralocorticoid is

a. epinephrine.
b. norepinephrine.
c. aldosterone.
d. cortisol.
e. estrogen.


C

Biology & Microbiology

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Over many generations man has chosen certain desirable characteristics in dogs by allowing dogs possessing those characteristics to reproduce. In this way, 150 breeds of dogs, all the same species, have descended from wolves. This process is referred to as

A. convergent evolution. B. natural selection. C. inheritance of acquired traits. D. artificial selection.

Biology & Microbiology

What is the part of a sarcomere that contains only thin filaments?

A) Z line
B) H band
C) I band
D) A band

Biology & Microbiology

Scientists suspect that the first macromolecules to form when cells first arose were

A. enzymes. B. RNA. C. DNA. D. polysaccharides.

Biology & Microbiology

Which of the following organelles are most likely to be able to divide and reproduce much like a cell does?

A. both mitochondria and chloroplasts B. peroxisomes only C. mitochondria only D. chloroplasts only E. mitochondria, chloroplasts, and lysosomes

Biology & Microbiology