Phytoplankton

free-floating autotrophs and heterotrophs that live in freshwater and marine ecosystems

• carcass

• minnow

• fossil

• plankton

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

NGSS.MS-LS2-2

How are phytoplankton similar to small trees?

• Both are at the top of the food chain

• Both conduct photosynthesis

• Both grow in soil

• Both are about the same size

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Which organisms are the basis of a marine food web?

• Crabs

• Photoplankton

• Fish

• Zooplankton

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NGSS.MS-LS2-3

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How can the orca be a 5th level consumer?

• phytoplankton --> krill --> ringed seal --> polar bear--> orca

• phytoplankton --> krill --> arctic cod --> orca

• phytoplankton --> krill --> arctic cod --> ringed seal --> polar bear--> orca

• phytoplankton --> krill --> arctic cod --> polar bear--> orca

Tags

NGSS.MS-LS2-3

The following food chain exists in a marine ecosystem: phytoplankton→zooplankton→Fish. If seals that eat fish are added to the ecosystem, what would happen to the phytoplankton population?

• The phytoplankton population would increase

• The phytoplankton population would decrease

• The phytoplankton population would remain the same

• The phytoplankton population would become extinct

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NGSS.MS-LS2-3

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NGSS.MS-LS2-2

NGSS.MS-LS2-1

What is the primary role of phytoplankton in aquatic ecosystems?

• Primary producers

• Primary consumers

• Decomposers

• Predators

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NGSS.MS-LS2-3

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Which of the following is a characteristic feature of phytoplankton?

• Ability to photosynthesize

• Ability to decompose organic matter

• Ability to move against currents

• Ability to live on land

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NGSS.MS-LS2-3

NGSS.MS-LS1-6

Phytoplankton are most abundant in which part of the ocean?

• Abyssal zone

• Benthic zone

• Euphotic zone

• Aphotic zone

Which nutrient is often a limiting factor for phytoplankton growth in oceans?

• Nitrogen

• Carbon

• Oxygen

• Hydrogen

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NGSS.MS-LS2-4

NGSS.MS-LS2-1

How do phytoplankton contribute to the carbon cycle?

• By releasing carbon dioxide during respiration

• By absorbing carbon dioxide during photosynthesis

• By decomposing dead organisms

• By consuming other organisms

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NGSS.MS-LS2-3

NGSS.MS-LS1-6