Organic compounds break down spontaneously in the presence of ____; hence, life probably never

would have emerged if the ancient atmosphere had been the same as the present one.
a. carbon dioxide
b. hydrogen
c. oxygen
d. nitrogen
e. silica


C

Biology & Microbiology

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Animals that mark and defend a home range against other animals are exhibiting

A. symbiotic behavior. B. territorial behavior. C. imprinting. D. habituation. E. taxis behavior.

Biology & Microbiology

The hormone ____ is involved in a positive feedback cycle that results in strong uterine contractions during labor

a. estrogen b. oxytocin c. cortisol

d. progesterone e. prolactin

Biology & Microbiology

Ants, termites, and some other insects as well as

mole-rats are __________. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

What are the functions of the TRAMP complex in yeast?

What will be an ideal response?

Biology & Microbiology