Environmental Changes

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived?

• Certain producer organisms would become more abundant in the area.

• Other manatees would move into the area and restore balance.

• Predators in the area would have more food to eat.

• The area would not be affected.

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Raccoons eat aquatic animals. If chemicals entered the lake with rain water and destroyed the plants, how would this impact the raccoon population?

• Raccoons would have more aquatic animals to eat.

• Raccoons would begin eating land plants.

• Raccoons would have less aquatic animals to eat.

• Raccoons would only drink water.

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There are many large-mouth bass, a type of fish, living in a small lake near Waco, Texas. How would increased fishing in the lake effect the lake ecosystem?

• Predators of the bass might starve due to loss of a food source

• The population of the bass’ prey would decrease.

• The bass would spend more time swimming near the surface

• Water level in the lake would decrease as more fishing took place
  

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If a disease destroying barley plants in a field swept through an ecosystem, what would happen to the barley eating bird population in the the field ?

• The bird population would stay the same

• The bird population would increase fast

• The bird population would decrease

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What would happen if the mouse population went extinct?

• The Kestrel (Hawk) population would increase

• The Blackberry plants would increase

• The Rabbit population would decrease

• The grass would increase

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Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants

• frog

• praying mantis

• owl

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when animals graze so much that the vegetation is damaged

• impact

• overpopulation

• overgrazing

• fertilize

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An organism that cannot adapt to changes in the environment will most likely - 

• produce more offspring

• die

• change its traits to survive

• store more food

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When a change occurs in an environment, organisms will

• only adapt

• adapt, migrate, or die

• migrate or die

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Very little rainfall, hot weather, and cracked ground describe which change to an environment?

• volcanic erruption

• landslide

• drought

• flood

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