A population of grasshoppers in the Kansas prairie has two color types: green and brown. Typically, the prairie receives enough rainfall to maintain healthy, green grass. Assume a bird species that eats grasshoppers moves into the prairie
How will this affect the natural selection of the grasshoppers? How might this change in a drought year, when the grass turns brown?
The brown phenotype may be more easily detected by the bird predator and decrease in frequency when the prairie is green. The opposite may be true in drought years when the green phenotype is more visible.
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Which of the following defends against BOTH bacteria and viruses?
a. interferons b. lysozyme c. NK cells d. plasma cells e. cytotoxic T cells
Which sort of interaction is harmful to one species but beneficial to the other? What will be an ideal response?
Within the phylum Cnidaria, corals are most closely related to:
A. Hydra. B. jellyfish. C. sea anemones. D. Portuguese man-of-war. E. hydrozoans.
Nonreplicative transposition
a. leaves a region of multiple tandem repeats at the donor site. b. leaves the recipient site unaltered. c. leaves a double-strand break at the donor site. d. leaves the donor site unaltered. e. leaves a double-strand break at the recipient site.