All of the following features are true of primates except
A. they are mammals with grasping fingers and toes.
B. they belong to the order containing lemurs, monkeys, and apes.
C. they have binocular vision.
D. they have prehensile tails.
D. they have prehensile tails.
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When insect populations exposed to insecticides develop resistance to these toxic chemicals over time, it is an
example of natural selection ____.
a. changing nonmorphological traits b. altering reproductive mechanisms c. acting in a goal-oriented manner d. replacing morphological characteristics e. facilitating mutations in populations
Adenine and guanine are
a. nitrogenous bases. b. base pairs bonded together in DNA. c. bases found only in RNA. d. waste products of protein synthesis. e. amino acids.
A physician has a patient with an abnormal heart sound. After running some tests, the doctor decides that the patient has a heart murmur, but the condition is not severe enough to warrant open-heart surgery
Which of the following would lead the doctor to make this determination? A) The amount of blood flowing backward in the heart is not enough to strain the heart as it works harder to catch up. B) The heart sounds are due to air moving through the system and cannot be removed via surgical techniques. C) The amount of blood lost is easily replaced with a transfusion of extra blood. D) A heart murmur is actually caused by a harmless lung irregularity.
Consider the chemical reaction for photosynthesis as a redox reaction. Which of the following is reduced/oxidized?
a. Carbon dioxide is reduced to glucose and water is oxidized to oxygen. b. Carbon dioxide is oxidized to glucose and water is reduced to oxygen. c. Carbon dioxide is reduced to oxygen and water is oxidized to glucose. d. Carbon dioxide is oxidized to oxygen and water is reduced to glucose.