Understanding Symbiotic Relationships

Some plant roots grow with mycorrhizal fungi. The fungi absorb water and minerals and pass them on to the plant and receive carbohydrates (food) from the plant. This is an example of —

• Competition

• Predation

• Parasitism

• Mutualism

A symbiotic relationship in which one organism benefits while one organism is harmed is known as:

• Antagonism

• Commensalism

• Parasitism

• Mutualism

In some coral reefs, a symbiotic relationship exists between pygmy seahorses and sea fans. The pygmy seahorse can wrap its tail around the branches of the sea fan. This allows the pygmy seahorse to be camouflaged within the sea fan, protecting it from predators. The pygmy seahorse does not harm or benefit the sea fan while it grasps the branches with its tail. What is the correct classification of this symbiotic relationship?

• Predator/Prey

• Mutualism

• Commensalism

• Parasite/Host

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NGSS.MS-LS2-2

Which answer choice best describes a community?

• Praying mantises caring for their young

• Three-spined sticklebacks living in estuaries

• Different species of plants, animals, and microorganisms living together in a forest

• A single species of fish in a pond

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NGSS.MS-LS2-2

Which of the following is an example of mutualism?

• A lion hunting a zebra

• A tick feeding on a dog

• Bees pollinating flowers while collecting nectar

• A bird building a nest in a tree without harming it

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NGSS.MS-LS2-2