Two nearby populations in which there is some movement of individuals between the populations are an example of:
A) gene flow. B) genetic drift.
C) disruptive selection. D) bottleneck effect.
Answer: A
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Which of the following groups is classified as Homo sapiens?
A) Neanderthals B) Cro-Magnons C) Paranthropus D) Australopithecus E) none of the above
Which of the following describes the exchange of gases between a respiratory surface and the
circulatory system?
a. ventilation b. cellular respiration c. perfusion d. bulk flow e. physiological respiration
The study of the genetic variability within a population and the forces that change allele frequencies is:
a. variation ecology. b. evolutionary genetics. c. population genetics. d. cytogenetics. e. allele genetics
According to the sliding-filament model of muscle contraction, a sarcomere contracts when its ________
A) thick filaments slide across the ends of the sarcomere B) thin filaments slide across the ends of the sarcomere C) thin and thick filaments slide further away from each other D) thin and thick filaments slide past each other to get closer together