Define a species cluster and provide examples
What will be an ideal response?
ANSWER: A species cluster is a group of closely related species recently descended from a common
ancestor. Species clusters are often found in oceanic archipelagos because of multiple
invasions on each island in an archipelago. Species of fruit flies on the Hawaiian Islands
provides an example of a species cluster that evolved relatively rapidly.
You might also like to view...
Estradiol is an example of _____
A) an androgen B) an estrogen C) a progestin D) a catecholamine E) a glucocorticoid
Hormones play a role in which of the following processes in humans? Select all correct
A. circadian rhythms B. regulating blood glucose levels C. sexual arousal D. childbirth E. metabolism
Lakes with elevated dissolved nutrients and low water clarity are called
A. lotic. B. oligotrophic. C. eutrophic. D. pelagic. E. photic.
When you step on a cockroach or smash a fly, the blood appears colorless because
A. there are no cells in the hemolymph. B. the blood is enclosed in a closed circulatory system. C. it does not contain hemoglobin or any other respiratory pigment. D. the blood is actually a colorless hemolymph that carries oxygen on molecules other than reddish hemoglobin.