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SAT Biology (Ecological) → SAT Biology sample questions from 11 to 20
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11. All of the following ideas are essential to Charles Darwin theory of natural selection EXCEPT
(A) individuals tend to produce more offspring than can survive
(B) variation is present in all populations
(C) characteristics acquired by one parent can be passed on to their offspring
(D) resources are usually limited
(E) those individuals who produce the most fertile offspring are the most fit
12. The secondary structure of proteins whose conformation may be an alpha helix is due to
(A) the hydrogen bonds between a carbonyl group of one amino acid and the amino group of another
(B) the hydrogen bonds between variable groups
(C) the interactions between hydrophobic and hydrophilic variable groups
(D) the interactions between the positively and negatively charged variable groups
(E) all of the above
13. A student cut a 2 cm3 block out of a potato and massed the block. She then placed the block in distilled water and waited an hour. If she remassed the block she could expect which of the following?
(A) the mass to increase due to plasmolysis
(B) the mass to increase because the potato is hypertonic to the water
(C) the mass to decrease because the potato will loose its water
(D) the mass to decrease because of the higher water potential in the potato
(E) the mass to remain the same because there are no living components in this system
14. Red-green colorblindness in humans is a sex-linked trait. If a woman with normal vision, whose father was colorblind, married a man whose mother was colorblind, what would be the probability of their first child being a colorblind girl?
(A) 0 percent
(B) 12.5 percent
(C) 25 percent
(D) 50 percent
(E) 100 percent
15. What are the number of different types of gametes that can be produced by an organism whose genotype is AaBbCcDd?
(A) 8
(B) 10
(C) 12
(D) 14
(E) 16
16. The number of chromosomes in normal humans is 46. After meiosis in sperm production, the number of chromosomes I would be _________ and the number of resulting cells would be ________.
(A) 46, 2
(B) 23, 2
(C) 46, 1
(D) 23, 1
(E) 23, 4
17. Which statement is NOT true for ferns?
(A) The gametophyte is larger than the sporophyte
(B) The sori give rise to the gametophytes
(C) Eggs are fertilized by sperm in the archegonia
(D) Ferns possess vascular tissue for the transport of water and minerals
(E) Male gametes depend on water for fertilization
18. In symbiotic relationships, groups of two or more organisms live in physical proximity. Which of the following types of symbiosis depicts commensalism?
(A) A little bird riding on the back of a rhino, picking parasites off the back of the rhino
(B) Undertaker bees removing dead bees from the hive of worker bees
(C) A wrasse cleaning the parasites off the gills of a bigger fish
(D) An egret riding on the back of a cow, looking for food in cow patties
(E) All of the above are commensalistic
19. Competition between members of a prairie dog population could be expected to increase as a result of an increase in the
(A) spread of disease among the prairie dogs
(B) prairie dog intrinsic reproductive rate
(C) mortality rate of prairie dogs
(D) natality rate of prairie dog predators
(E) number of secondary consumers
20. The rain shadow effect is used to describe rainfall around certain mountain ranges. Which of the following statement is true?
(A) The northern hemisphere and the southern hemisphere have the same prevailing winds
(B) Cool air can hold more moisture than warm air
(C) In the northern hemisphere, there is more rainfall on the eastern slopes
(D) You would expect deserts to form on the western side of mountain ranges in the northern hemisphere
(E) None of the above statements are true
ANSWERS: SAT BIOLOGY SAMPLE QUESTIONS
11. C
12. A
13. B
14. C
15. E
16. A
17. A
18. D
19. B
20. E