Which of the following is the only source of new variation in a population?

A) gene flow
B) genetic drift
C) mutation
D) nonrandom reproduction
E) natural selection

Within the chordate classes, the unique characteristic of the class Aves is:

A) flight.
B) production of uric acid.
C) feathers.
D) endothermy.
E) a forked tongue.

A patient in a skiing accident is told that the lateral side of the ankle joint has been crushed. The bone that has been injured is the ________.

A) femur
B) tibia
C) fibula
D) calcaneus
E) talus

What occurs when the Northern Hemisphere is most tilted away from the sun and has its shortest day?

A) winter solstice
B) summer solstice
C) spring equinox
D) autumn equinox
E) both solstices

An organism's complete set of genetic material is its ____.

A) proteome
B) genome
C) DNA library
D) probe
E) transcriptome

Which of the following is not an example of interaction between cell mediated immunity and innate immunity?

A) Macrophage of innate immunity present antigens to helper T cells.
B) Cytokines secreted by helper T cells stimulate inflammation.
C) Cytokines secreted by helper T cells stimulate phagocytosis.
D) Macrophages of innate immunity present antigens to cytotoxic T cells.

Which one of the following is part of the axial skeleton?

A) ribs
B) fibula
C) humerus
D) coxal
E) radius

Which of the following is not a property of reflexes?

A) Reflex responses are very predictable.
B) Reflexes are responses to sensory inputs.
C) Reflexes are quick responses of the nervous system.
D) Reflexes are not voluntary.
E) Reflexes do not require a stimulus.