Courtship for Anolis lizards involves the male displaying a dewlap (skin under the throat area) that varies in appearance based upon the species and their environment. Lizards that are found in darker, more shaded environments will have dewlaps that are lighter in color because they are more noticeable by potential mates. What mechanism is at work in speciation among Anolis lizards?
A. Natural selection
B. Postzygotic isolation
C. Genetic drift
D. Reinforcement
Answer: A
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A zygote
A. has a diploid set of homologous chromosomes. B. is formed by fertilization. C. All of the answer choices are correct. D. has mixed chromosomes from two gametes. E. is the result of sexual reproduction.
Four of the five answers listed below are
related to translation. Select the EXCEPTION.
a. ribosomes b. transcription c. DNA polymerase d. mRNA e. tRNA
What is an asteroid?
a. dust and small rock orbiting around the sun b. a ball of ice with a tail c. a small planet d. a small sun with weak solar emissions e. more than one of these
One theory holds that the first self-replicating molecules were
A) carbohydrates. B) lipids. C) RNA. D) DNA. E) amino acids.