7th semester 2 unit 2 spring 2022

Which of the following is not a limiting factor in an ecosystem?

• temperature

• food

• a rainy day

• shelter

Describe what the environment of a fish is like.

What would happen to a population of rabbits if their natural predators were removed from their habitat?

Which of the following is NOT an example of a natural disturbance?

• volcanic eruption

• forest fire

• a flood

• an oil spill

Give an example of how humans disrupt the balance of nature in our everyday life.

How much must the population of a species decrease over a ten-year period to be classified as endangered?

• 70%

• 10%

• 50%

• 20%

Which of these is the primary reason for the extinction of a species?

• overhunting

• pollution

• sudden environmental changes

• loss of habitat

All of the animal and plant populations living in a particular area make up a _____.

• population

• community

• habitat

• ecosystem

Which statement is NOT true?

• Living things and their environment affect each other.

  check

• Non-living things cannot affect living things in an environment.

• Ecology examines how everything is connected.

• The environment contains all the materials and energy needed for living organisms to carry out their life activities.

How does deforestation increase the level of carbon dioxide in the atmosphere? (Select all that apply.)

• Smoke from tree-clearing equipment adds large amounts of carbon dioxide to the atmosphere.

  close

• increasing ozone in the atmosphere by decreasing the rate of photosynthesis

  check

• burning trees, releasing more carbon dioxide into the atmosphere

  check

• decreasing the rate of photosynthesis by removing trees