Interactions in Ecosystems

True or False: Each species has a niche in their habitat.

• true

• false

What is a habitat?

• all the living and non-living things in a given area.

• all the organisms of the same species that live in the same area

• a place within an ecosystem that provides food, water and shelter

• the way a species interacts with abiotic and biotic factors

The demand for food, water and shelter is called _____________________.

How do humans compete for resources?

• they divert water

• they plough grassland

• they clear forests

• they fill in wetlands

What can overpopulation in an ecosystem do?

• create more resources

• damage the environment

• spread diseases

• create more space

Why is overpopulation temporary?

• populations move away

• populations starve

• populations die from disease

• all of these

_____________________________ help control the populations of prey.

Mutualism is a symbiosis that:

• benefits both organisms

• benefits one organism but harms the other

• benefits one organism but doesn't benefit or harm the other

Commensalism is a symbiosis that:

• benefits both organisms

• benefits one organism and harms the other

• benefits one organism but doesn't benefit or harm the other

Parasitism is a symbiosis that:

• benefits both organisms

• benefits one organism and harms the other

• benefits one organism but doesn't benefit or harm the other