Which trait is least consistent with evolution by sexual selection?
a. males are larger than females
b. females actively choose superior males
c. males often bear showy or defensive structures
d. males gather and defend harems of females
e. female queen bees are responsible for reproducing
ANSWER: e
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Which of the following processes will occur in the presence or absence of oxygen?
A. glycolysis B. electron transport chain C. oxidative phosphorylation D. cellular respiration E. citric acid cycle
Blood pH is kept near a value of 7.3-7.5 because of
a. salts. b. buffers. c. acids. d. bases. e. water.
Of all organisms, prokaryotes are
a. the smallest. b. the most abundant. c. the most metabolically diverse. d. the most widespread. e. all of these.
What is the most common element in your body?
A) Oxygen B) Water C) Carbon D) Sugar