The best explanation for the phenotypic differences between humans and chimps despite the great similarities in their gene-coding sequences is
A. the vast differences in exons between their genomes.
B. the "junk" DNA of humans contains important sequences not present in chimps.
C. the vast differences in the introns between their genomes.
D. differences in gene expression between species.
Answer: D
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Based on mortality rates shown in Figure 46.11, which stage of the lime swallowtail life cycle would you expect to be the shortest?
A. the egg stage B. the larval stage C. the pupal stage
Which region(s) of the brain, present in a 5-week old embryo, is/are derived from the forebrain?
a. telencephalon only b. diencephalon only c. mesencephalon only d. telencephalon and diencephalon e. telencephalon and mesencephalon
Allocation of energy to reproduction reduces the amount of resources available for ________
Fill in the blank(s) with correct word
DNA polymerase I
A. seals DNA gaps. B. adds bases to new DNA chain. C. removes primers. D. proofreads DNA chain. E. All of these choices are correct,