What is the definition of a species cluster?
a. a group of closely related species with a common ancestor
b. a group of species that developed host races
c. a group of species that exhibit polyploidy
d. a group of totally unrelated species living in a common habitat
e. when allopatric and parapatric speciation occur together
A
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The energy source that powers the process of photosynthesis is
A. water. B. oxygen. C. sunlight. D. carbon dioxide. E. glucose.
The __________ secretes aldosterone, which targets the kidney, and __________, the stress hormone. Fill in the blank(s) with the appropriate word(s)
Bully whippets are abnormally heavily muscled because _____
a. they have a over-abundance of testosterone b. they have an over-abundance of growth hormone c. they are heterozygous for the deletion in the myostatin gene d. they are homozygous for the wild-type myostatin gene e. they are homozygous for the deletion in the myostatin gene
Women wishing to get pregnant can monitor the
amount of which of the following? a. LH b. PSA c. MDH d. ESP e. none of these