The movement of individuals from one population to another can alter the allele frequencies in one or both of the populations. This is an example of ______.
a) genetic drift
b) mutation
c) gene flow
d) natural selection
Answer: c) gene flow
You might also like to view...
A population of mountain goats are split because of the formation of a glacier. After 500 years the glacier melts and the two goat populations are free to move between the two areas. Under what conditions might a hybrid zone occur?
A. Both pre-¬ and post-¬zygotic isolating mechanisms have arisen. B. Reproductive isolation is incomplete. C. Pre-¬zygotic isolating mechanisms have arisen. D. Post-¬zygotic isolating mechanisms have arisen. E. Gene flow between the two populations does not occur.
The fossil records indicates that ________ lived in families of male-female pairs, used fire, and left evidence of social cooperation (lived communally).
A) Homo habilis B) Australopithecus C) Dryopithecus D) Homo erectus
During exposure to elevated glucose, a yeast cell will increase its uptake of glucose. Describe the mechanism by which the yeast sense the extracellular glucose.
A. by glucose uptake through glucose transporters B. by the increase in energy inside the cell when the glucose is metabolized C. by glucose diffusing into the nucleus and binding to transcription factors D. by glucose binding to glucose receptors E. by the increase in energy outside the cell when the glucose is metabolized
Structures such as hair and nails are part of the:
A) lymphatic system. B) muscular system. C) endocrine system. D) skeletal system. E) integumentary system.