2014 AP Biology生物真题系列之选择题免费下载

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2014 AP Practice Exam Biology Multiple Choice and Grid-In Questions Free Download

2014 AP 生物模考选择题部分免费下载

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1）The lionfish is a venomous fish found primarily in the Red Sea and the Indian Ocean. In the 1990s, lionfish were accidentally released into the Atlantic Ocean, where they found abundant resources and favorable environmental conditions. Which of the following scenarios is most likely to result in the lionfish having a major impact on the communities into which they were introduced?

1. With no natural predators, the lionfish population will become very large.
2. Some native species of invertebrates will develop a resistance to lionfish venom.
3. Random mating will allow the lionfish population to reach Hardy-Weinberg equilibrium.
4. A virus that specifically infects lionfish will become more prevalent.

2)Cell communication is critical for the function of both unicellular and multicellular eukaryotes. Which of the following is likely true of cell signaling?

1. Cell signaling uses the highest molecular weight molecules found in living cells.
2. Cell signaling has largely been replaced by other cell functions in higher mammals.
3. Similar cell signaling pathways in diverse eukaryotes are evidence of conserved evolutionary processes.
4. Cell signaling functions mainly during early developmental stages.

3)A colony of termites was exposed to an atmosphere of 100 percent oxygen for three days. The insects were not immediately harmed by the treatment, but the protozoa that lived in the termites’ guts were eliminated. The treated termites continued to behave normally and to eat wood, but they began to starve after a short time.
When the treated termites were instead fed wood contaminated with the feces of untreated termites, the treated termites regained the ability to digest wood and no longer starved. The best analysis of the results of the experiment is that

1. infection with protozoa causes the termites to switch to fermentation
2. cooperative interactions between the termites and the protozoa allow termites to extract energy from wood to survive
3. the termite immune system eliminates protozoa from the gut
4. termites digest protozoa as their main source of energy

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