The process of ____________________ equalizes the dosage of functional genes carried on the X chromosome in
males and females Fill in the blank(s) with the appropriate word(s).
ANSWER: X inactivation
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The definitive host of a parasite is
A. the host for immature stages of the parasite. B. where the mature form of the parasite occurs. C. also the vector for the parasite. D. the host that the parasite name is based on. E. the host for the dormant stage of the parasite.
Aminoglycoside antibiotics
A. inhibit folic acid biosynthesis. B. inhibit cell wall synthesis. C. bind to bacterial DNA polymerase. D. bind to the 30S ribosomal subunit.
Which group of gymnosperms diverged first?
A. ginkos B. conifers C. gnetophytes D. cycads E. angiosperms
Which scenario is not an example of a prezygotic isolating mechanism?
a. An iris blooms at a different time of the year than a daffodil. b. A peacock puts on a different mating display than a sparrow. c. A snail with a shell coiling in one direction cannot mate with a snail whose shell curls in the other direction. d. A zebroid, a cross between a horse and zebra, is sterile. e. One type of roundworm would reject the sperm from another species of roundworm.