Biodiversity

Question 1

Explain how microevolution and migration can affect an ecosystem.

Revolt · Accepted Answer

Microevolution adapts populations to local conditions; migration introduces/removes alleles and can change community composition.

Question 2

What happens when an organism is removed from a food chain?

Revolt · Accepted Answer

Populations of dependent species decline or increase and the chain may collapse.

Question 3

Variation of ecological habitats within a species is characteristic of which type of diversity?

Revolt · Accepted Answer

Ecosystem diversity

Question 4

The variety of organisms within an ecosystem is characteristic of which type of diversity?

Revolt · Accepted Answer

Species diversity

Question 5

What happens to the other organisms in a food chain when an organism in the middle of the food chain is lost?

Revolt · Accepted Answer

Species above the lost organism decline due to less food; species below may increase unchecked.

Question 6

How does a decrease in biodiversity impact an ecosystem?

Revolt · Accepted Answer

Ecosystem becomes less stable, more vulnerable to disturbances and disease.

Question 7

When might an increase in biodiversity lead to a decrease in the stability of an ecosystem?

Revolt · Accepted Answer

Invasion by non-native species that increase species count but reduce overall stability.

Question 8

Adding an organism to a food chain does not affect the other members of the food chain, but removing an organism does.

Revolt · Accepted Answer

F

Question 9

The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.

Revolt · Accepted Answer

T

Question 10

What are the possible consequences of adding an organism to a food chain?

Revolt · Accepted Answer

New competition, possible overpopulation of some species, or altered predator-prey dynamics.

Biodiversity Answers