Commensalism

Symbiosis

Ecology

Mutualism

• Occurs when both organisms benefit from the relationship

• +, +

Commensalism

• Occurs when one organism benefits from the relationship, but the other is unaffected (neither hurt nor helped)

• +, 0

Parasitism

• Occurs when one organism lives off of and harms another organism

• +, -

Multiple Choice

Barnacles create home sites by attaching themselves to whales.

• Mutualism

• Commensalism

• Parasitism

Multiple Choice

Ticks feed on deer blood with harms the deer.

• Mutualism

• Commensalism

• Parasitism

Multiple Choice

Yucca flowers are pollinated by yucca moths. The moths lay their eggs in the flowers. Both species benefit.

• Mutualism

• Commensalism

• Parasitism

Multiple Choice

Hermit crabs live in shells made and then abandoned by snails.

• Mutualism

• Commensalism

• Parasitism

Multiple Choice

Honey guide birds alert and direct badgers to bee hives. The badgers feed on the honey and then allow the birds to eat.

• Mutualism

• Commensalism

• Parasitism

Multiple Choice

Mistletoe extracts water and nutrient from the spruce tree it is attached to.

• Mutualism

• Commensalism

• Parasitism

Poll

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