Interactions in Ecosystems

They help maintain balance and stability in the ecosystem.

They always lead to competition and extinction.

They only benefit predators.

They have no effect on the ecosystem.

Coyote

Robin

Lizard

Tree

One organism benefits and the other is harmed

Both organisms benefit

One organism benefits and the other is unaffected

Both organisms are harmed

Mutualism

Commensalism

Parasitism

Predation

By increasing the number of prey

By limiting prey population sizes

By eliminating all predators

By making all organisms herbivores

A) 1, 3, 4

B) 1, 2, 4

C) 2, 3, 4

D) 1, 2, 3

Wolves hunt in a group or pack to capture their prey.

Leafcutter ants bring leaves back to their nest to make food.

Several mosquitos lay eggs in a small body of water.

Two birds eat the berries on the same vine.