Ecosystem Interactions and Energy Flow

Which of the following best describes the role of producers in an ecosystem?

• They decompose organic material.

• They convert solar energy into chemical energy through photosynthesis.

• They consume other organisms for energy.

• They compete with other species for resources.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

In a food web, what is the primary role of decomposers?

• To produce energy for primary consumers.

• To break down dead organisms and recycle nutrients back into the ecosystem.

• To compete with producers for sunlight.

• To provide food for secondary consumers.

Tags

NGSS.MS-LS2-3

Which of the following is an example of a mutualistic relationship?

• A lion hunting a zebra.

• A bee pollinating a flower.

• A tapeworm living in a host's intestine.

• A bird eating insects off a buffalo's back.

Tags

NGSS.MS-LS2-2

How does energy flow through a food chain?

• From decomposers to producers to consumers.

• From consumers to producers to decomposers.

• From producers to consumers to decomposers.

• From consumers to decomposers to producers.

Tags

NGSS.MS-LS2-3

What is the main difference between a food chain and a food web?

• A food chain shows all possible feeding relationships in an ecosystem, while a food web shows a single path of energy flow.

• A food web shows all possible feeding relationships in an ecosystem, while a food chain shows a single path of energy flow.

• A food chain includes decomposers, while a food web does not.

• A food web includes only producers and consumers, while a food chain includes all trophic levels.

Tags

NGSS.MS-LS2-3

Which of the following best describes the concept of biodiversity?

• The number of different species in a given area.

• The total biomass of an ecosystem.

• The energy flow through an ecosystem.

• The number of trophic levels in a food web.

Tags

NGSS.MS-LS2-5

What is the primary function of nitrogen-fixing bacteria in the nitrogen cycle?

• To convert nitrogen gas into ammonia.

• To decompose organic matter.

• To release nitrogen gas back into the atmosphere.

• To convert ammonia into nitrates.

Which of the following is an example of a parasitic relationship?

• A bird building a nest in a tree.

• A tick feeding on a dog's blood.

• A fish cleaning a shark's teeth.

• A squirrel gathering nuts.

In an ecosystem, what is the role of primary consumers?

• To produce energy through photosynthesis.

• To consume producers and transfer energy to higher trophic levels.

• To decompose organic material.

• To compete with secondary consumers for food.

Tags

NGSS.MS-LS2-3

Which of the following best describes the process of photosynthesis?

• The conversion of chemical energy into heat energy.

• The conversion of solar energy into chemical energy stored in glucose.

• The breakdown of glucose into carbon dioxide and water.

• The release of energy from the breakdown of ATP.

Tags

NGSS.MS-LS1-6