If an organism has four copies of each chromosome, then it is
A. aneuploidy.
B. diploid.
C. haploid.
D. tetraploid.
E. polyploidy.
D
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What is responsible for termination of transcription in eukaryotic protein-coding genes?
A) a polyadenylation signal or poly(A) B) a termination loop composed of guanine C) a sigma factor D) a portion of the polymerase holoenzyme E) three nonsense mutations in sequence
Birds and mammals are considered polyphyletic when considering that
a. birds have wings and mammals do not. b. birds have feathers and mammals do not. c. birds and mammals do not share the same common reptilian ancestor. d. birds and mammals cannot interbreed. e. molecular clock data indicates birds and mammals diverged at the same time.
What best describes index fossils?
a. Organisms that existed over a limited period b. Organisms whose age is hard to detect c. Fossils that are used in radioactive dating d. Fossils of the most ancient organisms
Deductive reasoning proceeds from general to specific.
a. true b. false