Reproductive isolation in Darwin's finches was studied by Podos. He measured beak size and found a correlation between this and the finches'
A. song.
B. possible ability to attract certain mates.
C. flight patterns.
D. song and possible ability to attract certain mates are correct.
E. song, flight patterns and beak depth.
D. song and possible ability to attract certain mates are correct.
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In suggesting alternative hypotheses to explain the figure above, your lab partner states that perhaps mosses didn't evolve until recently, which is why they increase after herbs and shrubs. Which of the following would be the best response to your lab partner?
A. If you look carefully at the graph, there were a few mosses present 300,000 years ago, so they probably arose then. B. The percent of moss species has actually been steadily increasing since 300,000 years ago as climates became drier. C. Mosses are bryophytes and resemble early plants, so increases in more recent years more likely indicate a shift in climate. D. Mosses are angiosperms, so they didn't become widespread until the climate was dry enough for pollen transfer. E. Mammoths probably ate the mosses, so they did not appear until after the mammoths went extinct.
What is at the center of a heme molecule in a
hemoglobin?
a. a beta globin chain b. an alpha globin chain c. iron d. nitrogen e. another heme molecule
What would occur if the repressor of an inducible operon were mutated so that it could not bind the operator?
A) irreversible binding of the repressor to the promoter B) reduced transcription of the operon's genes C) continuous transcription of the operon's genes D) overproduction of catabolite activator protein (CAP)
During the process of ________, aquatic species release large numbers of gametes into the water
Fill in the blank(s) with correct word