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.

Biology & Microbiology

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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.

Biology & Microbiology

Where is the cardiovascular control center?

A) pons B) hypothalamus C) adrenal medulla D) adrenal cortex E) medulla oblongata

Biology & Microbiology

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)  D. cell differentiation E. cell migration

Biology & Microbiology

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.

Biology & Microbiology