Leukemia ________
A) decreases the production of white blood cells
B) increases the production of red blood cells
C) is a cancer of the white blood cells
D) is a cancer that arises in the lungs
C
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Winkler and Sheldon used the _____ to study _____ in swallows and martins
a. coefficient of relatedness; kin selection b. coefficient of relatedness; nest building behavior
c. comparative method; mating systems d. comparative method; nest building behavior e. reproductive method; kin selection
The breast muscle of turkeys and chickens is usually referred to as light meat, whereas that of wild ducks and geese is described as dark meat. How might this be explained?
A. The muscles of ducks and geese do not contain myosins. B. Turkeys and chickens do not fly for sustained periods, whereas wild ducks and geese do. C. The darker body color of ducks and geese provides protective camouflage against predators. D. Turkeys and chickens are not closely related to ducks and geese.
A(n) ____________________ growth is potentially harmful. Fill in the blank(s) with the appropriate word(s)
Luke sprained his ankle, tearing some of the collagen protein that forms his ligaments. Some types of collagen consist of three polypeptide chains twisted together to form a rope-like strand. What level of protein structure does this rope-like strand represent?
A. primary B. secondary C. tertiary D. quaternary