Which of the following statements about evolution of behavior is correct?
A) Natural selection will favor behavior that enhances survival and reproduction.
B) An animal may show behavior that minimizes reproductive fitness.
C) If a behavior is less than optimal, it will eventually become optimal through natural selection.
D) Innate behaviors cannot be altered by natural selection.
Answer: A
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The anticipated pleasure associated with a particular action, such as taking a drug
What will be an ideal response?
Proper functioning of the human kidney requires considerable active transport of sodium in the kidney tubules. If these active transport mechanisms were to stop completely, how would urine production be affected?
A. No urine would be produced. B. A lower-than-normal volume of urine which was less concentrated than the blood (hypotonic) would be produced. C. A lower-than-normal volume of urine which was more concentrated than the blood (hypertonic) would be produced. D. A greater-than-normal volume of urine equal in concentration to the blood (isotonic) would be produced. E. A greater-than-normal volume of urine that was more concentrated than the blood (hypertonic) would be produced.
What would result if more than one sperm fertilized an egg?
A. hermaphroditism B. parthenogenesis C. polyploidy D. twins E. haploidy
Which of the following statements about enzymes is FALSE?
The active site of the enzyme is where the chemical reaction takes place. The substrate binds to the enzyme with low specificity. The enzyme undergoes a conformational change that brings substrates closer together in an induced fit. The optimal activity of an enzyme occurs over a narrow temperature range. The optimal activity of an enzyme occurs within a narrow pH range.