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SAT Biology (Ecological) → SAT Biology (Ecological) practice test questions from 71 to 80

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71. In the development of a frog embryo, Speman’s primary organizer was found to be the
(A) dorsal ectoderm
(B) dorsal lip of the blastopore
(C) archenteron
(D) neural tube
(E) notochord

72. Choose the one statement that is true from among the following.
(A) FSH is produced in the ovaries and causes maturation of the follicle
(B) LH is produced in the pituitary gland and causes ovulation
(C) Estrogen is produced in the anterior pituitary gland and causes the endometrium to thicken
(D) Progesterone is produced in the posterior pituitary gland and causes the endometrium to thicken
(E) None of the above statements are true

73. If 9 percent of all cicadas exhibit the homozygous recessive condition known as “flippant wings,” what is the gene frequency for that gene in the general population?
(A) cannot be determined
(B) 91 percent
(C) 0.9
(D) 0.3
(E) 0.03

74. The wings of a bird and those of an insect are a good example of
(A) adaptive radiation
(B) coevolution
(C) convergent evolution
(D) all of the above
(E) none of the above

75. Which one of the following lists contains an organism that does NOT belong in that phylum?
(A) jellyfish, coral, anemone, starfish
(B) tunicates, birds, sharks, man
(C) bats, dogs, cats, sloths
(D) liver fluke, planaria, tapeworm, flatworms
(E) clam, squid, nautilus, snail

76. Choose the most Darwinian reason to describe how camels came to have flat, broad hooves.
(A) The camels that ventured further into the desert acquired broader feet, which were passed along to their offspring
(B) Those animals that had the broadest hooves were the most attractive to the opposite sex
(C) The animals that had the broadest hooves were able to travel farther and find water more easily than those that could not and subsequently perished
(D) Those animals with the broadest feet are descended from the camels that got broad feet from stomping out the forest fires that created the desert in the first place
(E) In the game of life, random events will move evolution toward the most successful adaptations possible

77. The age of the Earth is about __________ years, and life has existed on the Earth for __________ years.
(A) 3.5 billion, 2.5 billion
(B) 3.5 billion, 1.5 billion
(C) 15 billion, 3.5 billion
(D) 4.5 billion, 600 million
(E) 4.5 billion, 3.5 billion

78. Which of the following could be used to study evolution?
(A) DNA hybridization
(B) RFLPs
(C) structural homologies
(D) fossils
(E) all of the above

79. Which of the following is (are) a domain(s)?
I. Eukaryota
II. Archaebacteria
III. Eubacteria
(A) I only
(B) II only
(C) III only
(D) I, II, and III
(E) I and III

80. Which of the following organisms lacks a coelom?
(A) roundworms
(B) segmented worms
(C) clams
(D) grasshoppers
(E) people

ANSWERS: SAT BIOLOGY (ECOLOGICAL) PRACTICE TEST
71. B
72. B
73. D
74. C
75. A
76. C
77. E
78. E
79. D
80. A