In a typical predator-prey relationship, ____
a. the predator exerts selective pressure on its prey
b. the prey exerts selective pressure on its predator
c. the predator will not kill its prey
d. the predator feeds on carcasses
e. predator and prey exert selective pressures on each other
ANSWER: e
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In the reaction: pyruvate + CoA + NAD+ ? acetyl CoA + CO2 + NADH.
A. Pyruvate is reduced and CoA is oxidized. B. Pyruvate is oxidized and NAD+ is reduced. C. Pyruvate is reduced and NAD+ is oxidized. D. Pyruvate is oxidized and CoA is reduced.
The North American bison was hunted to near extinction in the 1800s, and has since recovered, but with decreased genetic diversity. This is an example of
A. gene flow. B. increased mutation rate. C. a bottleneck effect. D. natural selection. E. a founder effect.
The protein located in muscle cells that delivers oxygen directly to the mitochondria is
A. Hemoglobin B. Myoglobin C. Thyroxin D. Phytic acid
From the list below, which choice represents a correct difference between sperm production and egg production?
A) Four mature sperm are produced from one cell; one large egg is produced from one cell. B) Sperm are produced by somatic (body) cells; eggs are produced by gametes. C) Sperm are produced by mitosis; eggs are produced by meiosis. D) Sperm are produced by meiosis; eggs are produced by mitosis. E) Eight mature sperm are produced from one cell; two eggs are produced from one cell.