In mammals, urine drains out of the ____ into a collecting duct
a. distal convoluted tubule
b. Bowman's capsule
c. descending segment of the loop of Henle
d. proximal convoluted tubule
e. ascending segment of the loop of Henle
A
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Stem cells that can differentiate into any type of tissue but cannot differentiate into a complete organism are ______________ cells
A. totipotent B. pluripotent C. unipotent D. None of the choices is correct.
According to MacArthur and Wilson's island biogeography theory, which of the following would be expected to have the smallest species richness?
A. the mainland B. a large island near the mainland C. a large island far from the mainland D. a small island near the mainland E. a small island far from the mainland
The molecule serving as mRNA can be incorporated in the newly synthesized virus capsids of all of the following except
a. 1 strand RNA picornaviruses. b. 1 strand RNA togaviruses. c. 2 strand RNA rhabdoviruses. d. double-stranded RNA reoviruses. e. Rotavirus.
The mechanism of DNA replication is
A. semiconservative. B. complementary. C. intermediate. D. dispersive. E. conservative.