The plasma membrane contains how many layers of phospholipids?
A. one
B. eight
C. two
D. sixteen
E. four
Answer: C
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If mRNA is not modified what will result? a. The mRNA will not be able to leave the nucleus
b. The cell will self destruct. c. Mutation. d. The new protein will become activated earlier. e. The DNA code will become altered.
What is one clue that snakes evolved from
ancestral lizards?
a. some give live birth to their young b. some have bony remnants of hind limbs c. all have internal fertilization d. all have aminotic eggs e. some actually have legs
Codominance occurs when
A) expression of two different alleles alternates from one generation to the next. B) both of the alleles in a heterozygote are equally expressed phenotypically in an individual. C) a heterozygote expresses an intermediate phenotype. D) offspring exhibit several different phenotypic expressions of a single trait.
The evolution of similar forms in different lineages when exposed to the same selective pressures is
A. referred to as successive homologies. B. called convergence. C. called divergence. D. referred to as descent. E. also known as natural selection.