What does the graph in the figure above tell you about the definition of a keystone species?
A) A keystone species has little interaction with other species in an environment.
B) Removing a keystone species from the community drastically reduces diversity.
C) Adding a keystone species to the community will make it more diverse.
D) Removing a keystone species from the community will eventually allow for the invasion of a new species.
Answer: B
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A neomorphic mutation could result in an allele that
A) produces no gene product. B) produces a nonfunctional gene product. C) produces a novel protein that gives rise to a new phenotype. D) produces mutant protein subunits that aggregate with wild-type subunits, inactivating them. E) produces an altered protein that functions more efficiently than the wild-type protein does.
Suppose a neuron has a gap in its axon, a region with no voltage gated Na+ or K+ channels. Which statement below is true?
What will be an ideal response?
Andalusian chickens with the genotype CBCB are black, those with the genotype CBCW are gray. What is the relationship between the CB and the CW alleles?
A) CB is dominant to CW. B) CB is recessive to CW. C) CW is dominant to CB. D) The relationship is one of incomplete dominance. E) CB and CW are codominant.
A component of the plasma membrane that helps to maintain its fluidity is:
A) cholesterol. B) nucleic acid. C) protein. D) the phospholipid bilayer. E) carbohydrate.