A line transect would probably be the preferred method to quantify the population density of
A. blackbirds.
B. lions.
C. clown fish.
D. Ponderosa pines.
E. swallowtail butterflies.
D. Ponderosa pines.
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Which is usually true of archaea?
A. They are found as rods, spheres, or spirals. B. They reproduce by binary fission. C. They contain rigid cell walls. D. They are found as single cells. E. All of the choices are correct.
Viruses are in the group
A. viridaeae. B. eukarya. C. archaea. D. bacteria. E. None of the choices is correct.
A genetic signature for positive selection is
A) a gene sequence present in humans and other primates, but with at least one amino acid difference in the encoded protein in humans. B) a gene that is unique to humans. C) a gene sequence present in humans and other primates, but with no amino acid sequence differences. D) a gene that encodes a protein that makes the individual more sexually attractive.
Which of the following is false concerning fertilization?
A) Several sperm must contribute their DNA to the egg. B) Enzymes are released from the acrosome of the sperm to penetrate the egg. C) Most sperm die on their way to the egg. D) The process can take hours to complete.