Human cells that have completed telophase I will each contain ________ chromosomes, which will be in a(n) ________ form
A) 46; replicated
B) 46; unreplicated
C) 23; replicated
D) 23; unreplicated
C
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Microtubules grow longer:
A. more quickly at one end than the other. B. by growing outward from the centrosome. C. in cycles, following rapid depolymerization. D. if free tubulin dimers are available. E. All of these choices are correct.
A protist with two flagella where one is wrapped around a transverse groove and the other is draped in a longitudinal groove would be a member of which group?
A. Trypanosome B. Oomycetes C. Dinoflagellate D. Ciliophora
A study of certain nuclear genes in humans and chimpanzees shows that the two species differ in 5 percent of their DNA bases. Base substitution mutations occur at a rate of 1 percent per one million years. How many million years ago did these species diverge?
A) 0.5 B) 1 C) 3 D) 5
Mycorrhizae
a. increase plant growth. b. are symbionts. c. allow a plant to absorb more water. d. increase the surface area for absorption of water and minerals. e. have all of these characteristics