QUESTION: 89

-- Exhibit --
The most realistic description of energy flow through an ecosystem is a food web that represents an interconnected series of food chains. In general, the greater the number of alternative channels through which energy can flow, the greater the stability of the food web and the ecosystem.

The diagram shows a typical food web for a wet meadow. The hawk and the fox obtain nourishment by preying upon rabbits, frogs, snakes, and mice. The fox may even eat grasshoppers. If, for example, the rabbit population is reduced, possibly because of bad weather during the breeding season, the fox and hawk would shift their predatory pressure to other forms of prey. The rabbit population would then have a chance to bounce back and the ecosystem would remain stable.
-- Exhibit --
Based on the diagram, which consumer would have the greatest chance of surviving if the amount of available prey changes during the different seasons?

hawks
foxes
snakes
mice
rabbits

Answer(s): B

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QUESTION: 90

Exhibit:

Based on the information and diagram, which slide shows the most positive response of paramecia to a stimulus?

slide B
slide C
slide D
slide E
slide F

Answer(s): D

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QUESTION: 91

Refer to the following information and table.
The table below indicates the results of a preliminary study of a flu medication (RX). The subjects were randomly selected groups of males, ages 5070, residing in a North American city with a population of more than one million people.
Exhibit:

Based on the data in the chart and the information provided, which treatment appeared to be most effective in treating the early stages of the flu in these subjects?

Answer(s): D

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QUESTION: 92

The energy of an earthquake may cause other catastrophic events that continue long after the ground stops shaking. For instance, fires caused after the San Francisco earthquake of 1906 killed more than 200 people. However, not all deaths are necessarily confined to the immediate area of an earthquake. The effects of a Chilean earthquake in 1960--the strongest ever recorded--killed hundreds of people who lived thousands of miles away, from Hawaii, the Philippines, and Japan.
Which event was most likely the reason for the loss of life in Hawaii, the Philippines, and Japan in 1960?

Telephone lines went down between Chile and the rest of the world.
Massive ocean waves caused by the quake flooded low-lying areas.
Forest fires that started in Chile spread to Hawaii and Japan.
Airplanes flying from Chile crashed in Hawaii and the Philippines.
The quake was not reported in newspapers or on radio or TV.

Answer(s): B

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QUESTION: 92