CAM and C4 have evolved multiple times in a range of vascular plants because __________. (Select all correct answer options.)
A. no novel enzymes or biochemical
pathways are required
B. C4 and CAM photosynthesis likely evolved
from C3 ancestors
C. gene expression changed
D. land plants evolve rapidly
A,B
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Which of the following antigen types found in gram-negative enterics is mismatched?
A. K antigen - capsule B. O antigen - cell wall C. H antigen - flagellar D. All of the choices are correct matches.
Mutations that completely abolish the function of a wild-type allele are
A) null mutations. B) hypomorphic mutations. C) hypermorphic mutations. D) conditional mutations. E) neomorphic mutations.
Which of the following might be a possible
follow-up experiment? a. Repeat in a forest area totally devoid of native butterflies. b. Repeat in a wildlife sanctuary aviary after giving birds a chance to learn about yellow H. eleuchia. c. Repeat using young, inexperienced birds. d. Repeat, but count survivors for three weeks. e. Conduct all of these
In a life cycle such as that shown in part III of the figure above, if the zygote's chromosome number is 10, which of the following will be true?
A) The sporophyte's chromosome number per cell is 10 and the gametophyte's is 5. B) The sporophyte's chromosome number per cell is 5 and the gametophyte's is 10. C) The sporophyte and gametophyte each have 10 chromosomes per cell. D) The sporophyte and gametophyte each have 5 chromosomes per cell.