Typically, multiple interacting genes and the environment contribute to a complex quantitative trait, resulting in
A) discontinuous distribution of discrete phenotypes.
B) continuous variation of the trait in a population.
C) strict dominance of a single allele so that one phenotype is most common.
D) continuous variation of the trait in a single individual.
B) continuous variation of the trait in a population.
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Which of the following is false regarding cnidarians?
A. They have an outer epidermis and inner endodermis, in between which is a gelatinous mesoglea. B. Cnidarians have a wider variety of cells types than sponges—allowing more sophisticated tissue function. C. Many cnidarians are predators rather than passive filter feeders D. Cnidarians have a separate opening for the anus and the mouth.
Where is the cardiovascular control center?
A) pons B) hypothalamus C) adrenal medulla D) adrenal cortex E) medulla oblongata
Which of the following in NOT a possible cellular response to positional information during development?
A. cell adhesion B. cell division C. cell death (apoptosis)Â D. cell differentiation E. cell migration
Habitats set aside for endangered species are often sectioned into areas by roads, producing separate small populations. This causes problems in conservation because it reduces:
A) sharing of resources. B) the number of potential leaders. C) interaction among generations. D) gene flow between populations.