A color-blind man and a woman with normal vision whose father was color blind have a son. Color blindness, in this
case, is caused by an X-linked recessive gene. If only the male offspring are considered, the probability that their son is
color-blind is ____.
a. 25 percent
b. 50 percent
c. 75 percent
d. 100 percent
e. 0 percent
ANSWER: b
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In reptiles, the circulatory system of the lungs is nearly completely separate from the circulatory system of the rest of the body
Indicate whether the statement is true or false
Major trends in the evolution of animals
include
a. cephalization, the development of a definite head region. b. the development of types of symmetry. c. variation in coelomic cavities. d. segmentation. e. all of these
Pressure in the middle ear is equalized with the external air pressure through the auditory tube
Indicate whether the statement is true or false
In anaerobic respiration, the final electron acceptor is
a) oxygen. b) ATP. c) an inorganic molecule other than oxygen. d) an organic molecule.