The first organic molecule to be synthesized from inorganic substances was _____.
A. urea
B. acetic acid
C. ammonium cyanate
D. insulin
E. DNA
Ans: A. urea
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Soil mineral particles that range from 0.02?0.002 mm in diameter are called
a. sand. b. humus. c. clay. d. silt. e. macro/microparticles.
This orchid attached to a tree branch is an example of ____
a. competition
b. parasitism c. predation d. commensalism e. mutualism
In the skeletal muscle cells of vertebrates, as many as __________ molecules of ATP are produced
from one molecule of glucose. This is less than might be expected, because electrons from NADH produced during glycolysis must be shuttled through the __________ mitochondrial membrane at a cost. a. 2; outer b. 2; inner c. 38; inner d. 6; outer e. 36; inner
Water can ________ heat to help prevent rapid body temperature changes
Fill in the blank(s) with correct word