During normal human embryonic development, if ____, then the SRY gene switches development toward ____
a. a Y chromosome is present; maleness
b. an X chromosome is present; femaleness
c. two X chromosomes are present; femaleness
d. the X chromosome is absent; maleness
e. a Y chromosome is present; femaleness
ANSWER: a
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A. multicellular. B. diploid. C. bacterial. D. prokaryotic.
Which of the following antimicrobic tests determine the concentration of antimicrobic that is appropriate?
A) Kirby Bauer test and Tube dilution test B) Tube dilution test and E-test C) E-test and Kirby Bauer test D) Kirby Bauer test, Tube dilution test and E-test
In plants, primary growth occurs at a growing center called a(n)
A. cork cambium. B. apical meristem. C. vascular cambium. D. lateral meristem.
What are the conserved features of a bacterial promoter?
What will be an ideal response?