A(an) _______ is a variation of a gene
A. trait
B. character
C. gamete
D. allele
E. variant
D
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Which one of the following species is endangered by human activity but not yet extinct?
A. the dodo B. the dusky seaside sparrow C. the African white rhinoceros D. the carrier pigeon E. the Bali tiger
Bryophytes may feature all of the following at some time during their existence except
A) microphylls. B) rhizoids. C) archegonia. D) sporangia. E) placental transfer cells.
Hershey and Chase concluded that ________ is the hereditary molecule by examining how radioactively labeled molecules moved between a virus and bacteria
A) Lipids B) DNA C) protein D) phospholipids
Vegetations are associated with which of the following disease processes?
A) septicemia B) endocarditis C) tularemia D) plague E) toxoplasmosis