Unit 3 Biodiveristy

Which of the following would NOT lead to background extinction?

A species that is no longer in existence

Which of the following human cases of extinction is responsible for most extinctions today?

Humans hunt animals for many reasons. Elephants are mostly hunted for what reason?

What happens to the amount of biodiversity in an ecosystem when an invasive species is introduced?

In primary succession, the rock is first inhabited by hardy pioneer species. Which is an example of a pioneer species?

How many mass extinction events have occurred in Earth's history (not including the current one)?

A species that is non-native to an area that can cause harm

Biodiversity preserves the ecosystem services that we receive from nature. Which is NOT an ecosystem service?

A species of animal or plant that is seriously at risk of extinction

An organism that helps define an entire ecosystem. Without them, the ecosystem could crumble.

Indicator species are important because they help point to (or indicate) what about the environment?

A glacier retreats and uncovers rock that can be colonized would cause

The Burmese python is invasive in the Everglades of Florida. What affect can they have on their ecosystem?

Which of the following is not an example of secondary succession?

Nutria are invasive wetland rodents. They were introduced on purpose. Why?

Bats, birds, and bees are important for their ecosystem because they provide what essential service for plants

Which of the following would NOT lead to mass extinction?

The Asian Elephant is currently considered to be __________, meaning it is likely to become extinct in the near future.

Plant and animal species that are found in a particular geographical region and nowhere else in the world

The illegal hunting or catching of animals

As biodiversity decreases, _____________.