Most Swiss starlings produce four to five eggs in each clutch. Starlings producing fewer or more than this have reduced fitness. Which of the following terms best describes this situation?
A) artificial selection
B) directional selection
C) stabilizing selection
D) disruptive selection
E) sexual selection
Answer: C
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A plant is a
A. decomposer. B. consumer. C. producer. D. consumer and decomposer. E. consumer and producer.
Because it is possible for a female to mate with multiple males, any of whom could be the father, male mammals and birds always:
a. invest more in the care of the offspring. b. be the choosier sex in mating. c. have some degree of paternity uncertainty. d. invest less in the care of the offspring. e. mate with kin that they can trust.
Choose the one most appropriate statement for each.
A. Aminopeptidase B. Monosaccharides C. Lipase D. Amylase E. Disaccharidase F. trypsin G. Bile H. Pepsin I. Gastrin J. Pyloric sphincter
The White Cliffs of Dover, a famous landmark in England, is made of limestone, which is really a collection of the pore-studded shells (tests) of
A. foraminifera. B. brown algae. C. dinoflagellates. D. diatoms. E. spirochetes.