A Punnett square is used to determine
(a) probable gamete genotypes.
(b) possible parental phenotypes.
(c) possible parental genotypes.
(d) possible genetic outcomes of a cross.
(d) possible genetic outcomes of a cross.
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Which statement is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships? The fossil record reveals an increased incidence of _____.'
A) hard parts B) larger animals C) worm burrows D) organic material
A human cell has a mutation in the gene that encodes the enzyme that generates lactate from pyruvate, rendering that enzyme completely non-functional. Assuming that there is ample glucose present, how would this cell generate energy in the presence of oxygen?
A. Primarily through the break down of proteins into amino acids B. Glycolysis coupled with ethanol fermentation C. Aerobic respiration D. This cell would have no way to generate energy under these conditions because it cannot carry out the reactions needed for glycolysis
Refer to the accompanying figure. The component labeled as B is:
a. DNase.
b. DNA polymerase.
c. RNA primase.
d. RNA polymerase.
e. reverse transcriptase.
The sexual life cycle of plants is described as alternation of generations because it alternates between
A) reproductive plants and vegetative plants. B) eggs and sperm. C) flowers and spores. D) male plants and female plants. E) sporophytes and gametophytes.