________ is the study of body plans and structures among group of organisms
a. Biogeography
b. Comparative morphology
c. Continental drift
d. Evolution
e. Speciation
b
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Which of the following is an exogenous antigen?
A) a bacterium inside a cell B) a virus inside a cell C) a bacterium outside a cell D) a noninfected human cell E) the malaria parasite inside a red blood cell
A friend tells you that vintners use yeast that produce alcohol to turn grape juice into wine. He also observes that wine must still have living yeast in it because vintners don't pasteurize wine to kill the yeast. To make wine himself, he explains, he
added wine to grape juice with the expectation that the yeast would turn the juice into wine. It didn't work, and your friend wonders why not. In terms of population ecology, what can you explain to your friend about the death of his yeast? What will be an ideal response?
In angiosperms, double fertilization produces a trinucleate cell that gives rise to a ____ endosperm and a ____
embryo.
a. haploid; triploid b. triploid; haploid c. triploid; diploid d. diploid; triploid e. diploid; haploid
Which of the following is a characteristic of eukaryotic replications?
a. multiple origins of replication b. replication rate of 1,000 nucleotides/second c. circular chromosome structure d. lack of telomerase