Ecosystem Relationships and Interactions

What is the main role of a consumer in an ecosystem?

• Break down dead material

• Use sunlight to make food

• Eat other organisms for energy

• Produce oxygen

What best describes the relationship between a predator and its prey?

• Mutualism

• Parasitism

• Competition

• One organism hunts and eats the other

Tags

NGSS.MS-LS2-3

What is mutualism?

• A. One organism is harmed, and one benefits

• B. Both organisms benefit

• C. One organism eats the other

• D. Both organisms are harmed

Tags

NGSS.MS-LS2-2

What type of relationship exists when two organisms live in the same area and need the same resource to survive?

• Mutualism

• Predation

• Competition

• Parasitism

In a forest ecosystem, what might happen if all the decomposers were removed?

• Plants would grow faster

• Energy flow would improve

• Dead organisms and waste would pile up

• More producers would appear

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Which of these best describes a parasite?

• It kills and eats its prey

• It breaks down dead material

• It lives on or inside a host and harms it

• It makes its own food

Tags

NGSS.MS-LS2-2

A tick feeds on the blood of a dog. What type of relationship is this?

• Mutualism

• Commensalism

• Parasitism

• Cooperation

Which of the following best describes cooperation among organisms?

• Animals fighting for water

• A bird warning others of danger

• A wolf hunting a deer

• A tree shading other plants

Tags

NGSS.MS-LS2-2

What happens in predator-prey interactions over time?

• The predator population always decreases

• Both species go extinct

• The populations of both rise and fall in cycles

• The prey always outnumbers the predator

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is the role of producers in the food chain?

• They feed on consumers

• They decompose waste

• They convert solar energy into food

• They eat plants and animals

Tags

NGSS.MS-LS1-6

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