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SAT Biology (Ecological) → SAT Biology sample paper questions from 21 to 30

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21. The enzyme that assimilates carbon dioxide into the Calvin cycle is known as
(A) rubisco
(B) pepco
(C) catalase
(D) PEP carboxylase
(E) malate hydrogenase

22. The separation of plant pigments using paper chromatography is based on
(A) the non-polarity of the solvents and pigments
(B) the polarity of the paper
(C) the polarity of the pigments
(D) all of the above
(E) none of the above

23. Organisms are placed in different trophic levels according to how they obtain their energy. Another name for primary consumer is
(A) green plant
(B) herbivore
(C) carnivore
(D) omnivore
(E) decomposer

24. Some organisms living in a vacant lot include grass, dandelions, mice, grasshoppers, and slugs. Collectively these organisms represent
(A) an ecosystem
(B) a community
(C) a population
(D) a mutualism
(E) a biome

25. Darwin’s finches are a group of about twelve species of birds that live on the Galapagos Islands. The fact that they have different size beaks is regarded as a consequence of
(A) genetic drift
(B) coevolution
(C) competition
(D) chance
(E) behavioral modification

26. Predators in an ecosystem
(A) help the community by keeping the number of prey from outstripping their resources
(B) help the prey population by removing the sick and less fit individuals
(C) enhance species diversity
(D) reduce the possibility of competitive exclusion
(E) all of the above

27. A walking stick, a type of insect that is a primary consumer, is an example of an organism using
(A) aggressive mimicry
(B) Batesian mimicry
(C) camouflage
(D) Mullerian mimicry
(E) none of the above

28. The buildup of pesticides in ospreys is known as
(A) biological magnification
(B) food web dynamics
(C) succession
(D) keystone predation
(E) none of the above

29. An organism with the genotype AaVv can produce how many different types of gametes
(A) 1
(B) 2
(C) 4
(D) 6
(E) 8

30. In four-o-clocks, pink flowers are the result of a red allele and a white allele for the color gene. If you crossed a white with a pink, what would be the most likely result?
(A) 20 red and 20 pink
(B) 40 pink
(C) 20 red and 20 white
(D) 20 pink and 20 white
(E) 40 white

ANSWERS: SAT BIOLOGY (ECOLOGICAL) SAMPLE PAPER
21. A
22. D
23. B
24. B
25. C
26. E
27. C
28. A
29. C
30. D