What is the primary source of energy for producers in aquatic ecosystems?

• Chemical reactions

• Sunlight

• Heat from the Earth's core

• Nutrients in the water

Tags

NGSS.MS-LS1-6

Which of the following organisms is a primary consumer in a marine food web?

• Phytoplankton

• Zooplankton

• Sharks

• Seaweed

Tags

NGSS.MS-LS2-2

Explain how a food chain differs from a food web.

• A food chain is a linear sequence of organisms, while a food web is a complex network of interconnected food chains.

• A food chain includes only producers, while a food web includes only consumers.

• A food chain is found only in freshwater ecosystems, while a food web is found only in saltwater ecosystems.

• A food chain is a complex network, while a food web is a linear sequence.

Identify the role of producers in the trophic pyramid.

• They decompose organic matter.

• They convert solar energy into chemical energy through photosynthesis.

• They consume other organisms for energy.

• They store energy in the form of fat.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following best describes a saltwater ecosystem?

• An ecosystem with low salinity and high biodiversity

• An ecosystem with high salinity and low biodiversity

• An ecosystem with high salinity and high biodiversity

• An ecosystem with low salinity and low biodiversity

What is the role of consumers in an aquatic food web?

• They produce energy through photosynthesis.

• They decompose dead organic matter.

• They transfer energy by feeding on other organisms.

• They fix nitrogen in the ecosystem.

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NGSS.MS-LS2-2

NGSS.MS-LS2-3

Describe the process of bioaccumulation and its potential impact on top predators in an aquatic ecosystem.

• Bioaccumulation leads to the dilution of toxins in top predators, reducing their impact.

• Bioaccumulation results in the concentration of toxins in top predators, potentially causing harm.

• Bioaccumulation has no impact on top predators as they are immune to toxins.

• Bioaccumulation only affects producers and has no impact on consumers.

In a trophic pyramid, which level contains the most energy?

• Tertiary consumers

• Secondary consumers

• Primary consumers

• Producers

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

How does the concept of a trophic pyramid help in understanding energy flow in an ecosystem?

• It shows that energy is evenly distributed among all trophic levels.

• It illustrates that energy decreases as it moves up the trophic levels.

• It indicates that energy increases as it moves up the trophic levels.

• It demonstrates that energy is only present at the producer level.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the primary difference between a producer and a consumer in an ecosystem?

• Producers decompose organic matter, while consumers produce energy.

• Producers create their own food, while consumers rely on other organisms for food.

• Producers are always animals, while consumers are always plants.

• Producers are found only in saltwater ecosystems, while consumers are found only in freshwater ecosystems.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3