What is an example of predation?
A) the camouflage of a lizard in rocky habitats
B) a hawk swooping down quickly to capture, kill, and eat a prairie king snake
C) a goldfinch feeding on the seeds of a thistle plant
D) the vivid colors of the poison-arrow frog in Costa Rica
Ans: B) a hawk swooping down quickly to capture, kill, and eat a prairie king snake
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Cystic fibrosis is a recessive disorder. If a
couple, each of whom is heterozygous, have children, what is the probability that they will have a child with cystic fibrosis?
a. 0% b. 25% c. 50% d. 75% e. 100%
As it leaves the lung in the pulmonary vein, blood is ________ saturated with oxygen.
A) 90% B) 98% C) 108% (supersaturated) D) 100% (completely) E) 75%
A seedling growing toward the source of light is an example of:
a. shade avoidance. b. a positive hypersensitive response. c. a negative hypersensitive response. d. a positive phototropic response. e. a negative phototropic respons
A stage in embryological development which is a solid ball of cells is a
A. gastrula. B. fetus. C. blastula. D. morula.