16. In a species in which one male can fertilize many females and females chose

Question

16. In a species in which one male can fertilize many females and females chose which male to mate with, sexual survive in the local environment a results in improved ability for males to b, enhances the health of the overall population adapted to the environment c. reflects the ability of the females to choose the mate best d results in arbitrary and sometimes risky changes in male phenotype e, promotes the survival of the species vs. other species 17. A population of flowering plants generally selfpollinates, but is sometimes-relatively cross-pollinated by bees. Would you expect this population to be in Hardy- Weinberg equilibrium? a. Yes, because there is no sexual selection b. Yes, provided there is no recent immigration c. Yes, provided no particular allele is strongly selected for No. 18. Sickle cell anemia is caused by homozygosity for the s allele of the sickle cell gene Heterozygosity results in enhanced resistance to malaria. If 9% of a given African population is bom with sickle cell anemia, and we assume that the population is at equilibrium, what percent of the population is malaria-resistant? a. 3% b. 9% c. 7% d, 21% e, 42% 19. Plant cells have a cell wall. A plant cell s placed in pure water. With respect to the cell's interior, water is: a. hypertonic b. isotonic c. hypotonic d. neurotonic e, ginandtonic 20. In this solution the plant cell will a, swell and burst b, shrivel c. stay almost the same d. divide immediately in two e, fuse with a nearby cell

Explanation / Answer

16.c

17.a

18.

19.c water wiil move inside the cell through endosomsis causing cell to swell and finally burst.

20.a

21.c.Transport proteins are usually integral proteins which span the whole length of the membrane through which transport is made from one side to the other.

22.a.

23.c.Saturated fatty acid in the lipid bilayer increases the cold tolerance.

24.a.

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