Ms,Shaza-Grade 11A-M-Revision T3

Which of the following human activities would most likely help maintain Earth's carrying capacity?

• Overusing non-renewable energy resources

• Practicing sustainable agriculture and water use

• Increasing global meat consumption

• Replacing forests with urban areas

What is type of fire here:

• Tree crown fires

• ground fires

• secondary fires

What is type of fire here:

• Tree crown fires

• ground fires

• secondary fires

Why these two situations involving fire have different results on the pine tree populations.

• Crown fires promote growth, while ground fires limit growth

• Crown fires limit growth, while ground fires promote growth

• Both crown fires and ground fires limit growth

• Both crown fires and ground fires promote growth

How did human activities such as building dams and water barriers change the characteristics of the

Colorado River?

• By increasing water flow and biodiversity

• By reducing water flow and altering water temperature

• By enhancing biodiversity and promoting native fish species

How does pollution resulting from human activities affect populations ?

• By increasing available resources

• By enhancing biotic factors

• By making resources toxic and reducing availability

Which is a density- independent factor?

• competition

• extreme cold

• parasites

• predation

Which of the following depends on the number of members in a population per

unit area?

• An abiotic factor

• A density-dependent factor

• A density-independent factor

• A biotic factor

Which of the following is an example of population density?

• Country with a large population

• Maximum number of wolves in a forest

• Total number of alligators in Florida

• Two deer per thousand hectares

Why is disease considered a density-dependent environmental factor?

• Population density affects amount of contact.

• Disease spreads easily in a low-density population.

• Disease won't spread in high-density populations.

• Disease may be influenced by weather.