As world travel becomes easier and human populations intermix, the occurrence of what phenomenon will probably decrease?
A) sexual selection B) founder effect and genetic drift
C) immigration D) mutation
Refer to the scenario below, and then answer the following question(s).
Two European men and two Polynesian women settled on a previously uninhabited tropical island. All four of the settlers have brown eyes, a dominant trait, but one of the Europeans is heterozygous and carries the recessive gene for blue eyes.
Answer: B
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Cheetahs have been through a genetic bottleneck; evidence for this is that
A. the body is long, thin, and graceful. B. these cats are members of an endangered species. C. there is very little genetic variability. D. little natural selection occurs in this species. E. they originally came from small areas of Africa.
Why is the Hardy-Weinberg law useful in spite of the fact that its conditions are never met in natural populations?
What will be an ideal response?
Compare and contrast facilitated and active transport
What will be an ideal response?
Trichoplax
a. is a small, flattened, soft-bodied marine animal. b. is placed with sponges on the animal family tree. c. has the smallest genome of all the animals. d. has no mouth but rather uses extracellular digestion and absorption. e. fits all of these descriptions.