Symbiotic Relationships

A relationship between two organisms in which one organism benefits and the other is unharmed...

• Mutualism

• Commensalism

• Parasitism

Tags

NGSS.MS-LS2-2

A relationship between two organisms in which both organisms benefit.

• Mutualism

• Commensalism

• Parasitism

A relationship between two organisms in which one is benefited and the other is harmed.

• Mutualism

• Commensalism

• Parasitism

Ostriches and gazelles eat together. They both watch for predators and danger. Since they see things differently, they each can identify threats the other animal may not see. Both species are benefited.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers and the eggs hatch. The larvae eat some of the seeds, and spread them around. Both species are benefited.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

Mistletoe takes water and nutrients from the oak tree. This is good for the mistletoe but bad for the tree.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A bison walks through the grass, insects fly up and are seen and eaten by egrets. This neither harms nor helps the bison, but it is easier for the egrets to get food.

• mutualism

• parasitism

• commensalism

Tags

NGSS.MS-LS2-2

A flea feeds on a mouse’s blood. This is good for the flea but bad for the mouse.

• mutualism

• commensalism

• parasitism

Hermit crabs live in shells that snails don't use anymore. The hermit crab gets a nice free home. This neither harms nor helps the snails.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2

Birds build nests out of dead twigs and leaves. They build their nests in living trees. This doesn't hurt the tree.

• mutualism

• commensalism

• parasitism

Tags

NGSS.MS-LS2-2