In plants with ________, root hairs are less abundant because these fungal filaments take over their function for the plant.

A. mycorrhizae
B. branch roots
C. two pericycles
D. lichens


Answer: A

Biology & Microbiology

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Sexual reproduction:

A. results in offspring that are not genetically identical. B. results from combining genetic material from two gametes. C. results in a new generation that is not genetically identical to its parents. D. results in a new generation with the same number of chromosomes as the parents. E. All of these choices are correct.

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A benefit of _____ diversity is a species’ future potential for adaptation.

a. chemical b. genetic c. ecosystem d. physical

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In 2008, the United States generated about how many million tons of garbage?

a. 100 b. 200 c. 300 d. 400 e. 500

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Darwin and Wallace were the first to propose _____

A) that evolution occurs B) a mechanism for how evolution occurs C) that Earth is older than a few thousand years D) natural selection as the mechanism of evolution

Biology & Microbiology