One characteristic of continuous variation is that ____
a. traits are usually quantified by counting
b. only a single gene pair contributes to the phenotype
c. individual genes have a large effect on the phenotype
d. phenotypic expression varies across a wide range
e. it is best analyzed in individuals rather than in populations
Answer: d. phenotypic expression varies across a wide range
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Water is able to cross plant plasma membranes by a combination of
A. osmosis and aquaporins. B. evaporation and diffusion. C. root pressure and turgidity. D. diffusion and phloem. E. transpiration and Casparian strips.
A typical fat molecule has ____ fatty acid tails
a. one b. two c. three d. four e. five
Whales use sound to
a. communicate. b. locate food. c. map out their surroundings. d. communicate and map out their surroundings. e. do all of these.
If the population of the last common ancestor of humans, chimpanzees, and gorillas was very large, and humans split from chimpanzees very quickly after the gorilla lineage diverged,
how might this influence the relationship between gene trees and species trees in this clade? What will be an ideal response?