The type of reproductive barrier that occurs when two species mate but produce sterile hybrids is referred to as ________
A) mechanical isolation
B) temporal isolation
C) a postzygotic barrier
D) a prezygotic barrier
C
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Chlorophyll a absorbs which color(s) of light?
a. red b. green c. violet d. red, violet, and orange e. red, violet, and green
A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of
A) complete dominance. B) multiple alleles. C) incomplete dominance. D) polygenic inheritance. E) pleiotropy.
Which of the following is a true statement?
a. Flowers may have secondary growth. b. Secondary growth is a common feature of eudicot leaves. c. Secondary growth is produced by both the vascular cambium and the cork cambium. d. Primary growth and secondary growth alternate in the life cycle of a plant. e. Plants with secondary growth are typically the smallest ones in an ecosystem.
A researcher studying the impact of agricultural pesticides on native plants discovers a bacterium capable of degrading small amounts of a specific pesticide. The researcher then modifies the bacterial species in the lab to increase the rate of pesticide
degradation. This research represents A) applied microbiology. B) environmental microbiology. C) food microbiology. D) both food microbiology and environmental microbiology. E) both applied microbiology and environmental microbiology.