The portion of the DNA molecule that is translated is composed of ______________.
A. introns
B. anticodons
C. exons
D. transcriptions
E. exons and transcriptions
Answer: C
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Which of these is the best example of an umbrella species?
A. northern spotted owl. B. brown tree snake. C. humpback whale. D. giant panda. E. Gopher tortoise.
Populations rarely reach their biotic potential because ________
a. species cannot breed quickly enough b. the death rate always exceeds the birth rate c. there are limiting factors on population growth d. all of the choices
The above figure shows that ________.
A. meiosis forms diploid gametes B. meiosis results in the formation of four haploid daughter cells C. the human 2n number is 4 D. fertilization results in four haploid daughter cells
When natural selection tends to split a population into two phenotypic groups, it is called
A) balanced polymorphism. B) stabilizing selection. C) coevolution. D) gene flow. E) genetic drift.