CDB 1 21-22 Test Review

If the rabbit population increases, what result would you mostly likely see in the snake population?

• The snake population increased because there was less food available to eat.

• The snake population increased because there was more food available to eat.

• The snake population decreased because there was less food available to eat.

• The snake population decreased because there was more food available to eat.

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What do these graphs have in common?

• Both have the same rate of change.

• Both show an increase in population size.

• Both show a decrease in population size.

• The two graphs have nothing in common.

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Which of the following could NOT be a possible outcome if the wild cat population increased?

• The lion population would decrease.

• The lion population would increase.

• The rabbit population would decrease.

• The mouse population would decrease.

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Based on the graph, what can you infer about the relationships between the populations on the island?

• The snakes are predators who prey on both birds and spiders.

• The snakes and birds are both predators who prey on spiders.

• The snakes are predators who prey on the birds, and the birds are predators who prey on spiders.

• The snakes are predators who prey on spiders, and the spiders are predators who prey on birds.

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How would you recall the definition of BIOTIC FACTOR?

• "-otic" = process = living processes

• "bio" = biology = nonliving factors

• "bio" = biology = living factors

• What are biotic factors?

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What is one long-term effect of a volcanic eruption?

• animal population decrease due to deaths from inhaling volcanic gases

• plant population decrease due to deaths from lava

• climate change

• forest fire

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Which of these human activities is most likely to cause the excessive growth of phytoplankton in the world’s oceans?

• The use of chemical fertilizers that are carried by runoff into rivers

• The logging of old-growth forests, which results in erosion

• The spraying of chemical herbicides that reduce carbon dioxide in the air

• The mining of fossil fuels, which requires digging underground tunnels

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Which of these activities is most likely to increase the natural biodiversity in an over-fished, coastal area?

• Building artificial reefs and increasing fishing activity

• Introducing non-native species to fill unoccupied habitats and banning fishing

• Building artificial reefs and limiting fishing activity

• Eliminating non-native species and encouraging fishing for large predatory fish

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DDT is a pesticide that was once widely used to control agricultural pests and mosquitoes. However, this pesticide caused the eggshells of certain birds, including the brown pelican, to become fragile and thin as it passed through the food chain. The adults would then accidentally crush the eggs while trying to incubate them.

What happened to brown pelican populations as a result of DDT use by humans?

• The populations increased much more slowly.

• The populations decreased over a long period of time as fewer eggs survived long enough to hatch.

• The populations remained stable over time.

• The populations increased as pelicans laid more eggs so that more offspring would survive.

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Based on the weather map, which of the following could be a forecast of the upcoming weather at location B?

• Warm front moving in; temperatures and humidity are about to rise.

• Cold front moving in; possible thunderstorms followed by decreasing temperatures.

• Warm front moving in; possible thunderstorms followed by decreasing temperatures.

• Cold front moving in; temperatures and humidity are about to rise.

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