Recent studies of gene function as it relates to reproductive development suggest that angiosperms

evolved most directly from:a.
cycads.
b. lycopods.
c. gnetophytes.
d. ginkgos.
e. conifers


E

Biology & Microbiology

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Explain how, when improper base pairing escapes repair by the proofreading system, cells are able to detect and repair mutations

What will be an ideal response?

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An allele that is dominant in one sex but recessive in the other is

A) X-linked. B) sex-limited. C) sex-influenced. D) Y-linked.

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Many alleles cause phenylketonuria (PKU). A unique mutation found only in Yemenite Jews is probably

A) more ancient than other PKU mutations. B) a result of genetic drift. C) due to a strong heterozygote advantage. D) identical to the original allele.

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An advantage that multicellular organisms have over one-celled organisms is that cells in multicellular organisms 

A. are larger. B. reproduce sexually. C. can specialize. D. are slower moving.

Biology & Microbiology