Choose the best answer

1			Prezygotic isolating mechanisms include all of the following except Need a Hint?
			A)	hybrid sterility.
			B)	courtship rituals.
			C)	habitat separation.
			D)	seasonal reproduction.
2			Which of the following is an example of mechanical isolation? Need a Hint?
			A)	Two species of birds live in the same habitat; one mates in spring and the other in summer.
			B)	Two species of frogs have different mating calls.
			C)	The flower structure of one species prevents the transfer of pollen from another species.
			D)	One species of lizards inhabits the trees, and another species inhabits the ground cover.
3			__________________ isolating mechanisms include improper development of hybrids and failure of hybrids to become established in nature. Need a Hint?
			A)	Prezygotic
			B)	Postzygotic
			C)	Temporal
			D)	Mechanical
4			Reproductive isolation and the evolution of species could occur through which of the following? Need a Hint?
			A)	founder effect
			B)	reinforcement
			C)	adaptation
			D)	all of these
5			Speciation occurs most frequently in populations that are Need a Hint?
			A)	sympatric.
			B)	undergoing disruptive selection.
			C)	allopatric.
			D)	not geographically separated.
6			The large number of Hawaiian Drosophila species has likely resulted from Need a Hint?
			A)	adaptive radiation.
			B)	a single common ancestor.
			C)	geographic isolation.
			D)	all of these
7			The finch species of the Galápagos Islands are grouped according to their food sources; which of the following is not a finch food source? Need a Hint?
			A)	seeds
			B)	carrion
			C)	insects
			D)	tree buds
8			Cichlid diversity can be attributed to Need a Hint?
			A)	adaptive radiation.
			B)	new habitats and geographic isolation.
			C)	a second set of jaws in the throat of the fish.
			D)	All of the above contributed to cichlid diversity.
9			The hypothesis that evolution occurs in spurts, with great amounts of evolutionary change followed by periods of stasis, is Need a Hint?
			A)	punctuated equilibrium.
			B)	allopatric speciation.
			C)	gradualism.
			D)	Hardy-Weinberg equilibrium.
10			Biological diversity through time has Need a Hint?
			A)	gradually increased.
			B)	been constant.
			C)	increased overall despite periodic drops.
			D)	both increased and decreased with no overall change.