Relationships in Ecosystems

What are lichens made up of?

• A fungus and an alga or bacterium

• A plant and a fungus

• A bacterium and a virus

• An alga and a plant

What role does the fungus play in the lichen partnership?

• It produces food through photosynthesis

• It provides a structure and gathers nutrients

• It absorbs sunlight for energy

• It decomposes organic matter

Tags

NGSS.MS-LS2-3

How does the alga or bacterium benefit the fungus in a lichen?

• By providing shade

• By producing food through photosynthesis

• By absorbing water

• By decomposing organic material

Tags

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NGSS.MS-LS2-3

Why can lichens thrive in harsh environments?

• They have deep roots

• They can store large amounts of water

• Their partnership allows them to survive where others struggle

• They grow rapidly

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What is the term for when two different species live in close contact and interact regularly?

• Parasitism

• Symbiosis

• Commensalism

• Predation

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NGSS.MS-LS2-2

In mutualism, what occurs with the organisms?

• One benefits, one is harmed

• Both are unaffected

• Both benefit

• One benefits, one is unaffected

Which of the following is an example of commensalism?

• Hummingbirds and flowers

• Mistletoe on a tree

• Barnacles on whales

• Lions and zebras

What happens in parasitism?

• Both species benefit

• One benefits, one is unaffected

• One benefits, one is harmed

• Both are harmed

Tags

NGSS.MS-LS2-2

What type of relationship is shown between the whale and barnacles?

• Mutualism

• Commensalism

• Parasitism

• Predation

What type of relationship is shown between mistletoe and trees?

• Mutualism

• Commensalism

• Parasitism

• Symbiosis