Aquatic Organisms Quiz

What are the three groups of aquatic organisms mentioned in the passage?

• Fish, amphibians, and reptiles

• Fish, mollusks, and crustaceans

• Fish, mammals, and birds

• Fish, algae, and bacteria

Phytoplankton are characterized by:

• Being microscopic marine algae

• Being large marine animals

• Living on the ocean floor

• Being terrestrial plants

Zooplankton are:

• Microscopic animals that drift in water

• Microscopic plants that drift in water

• Large animals that swim in water

• Large plants that grow in water

Explain the role of benthos in aquatic ecosystems.

What is the function of decomposers in aquatic ecosystems?

• They produce oxygen

• They decompose organic matter

• They provide shelter for fish

• They photosynthesize

How are organisms in an aquatic ecosystem grouped?

• by size and shape

• by the food they eat

• by how they reproduce

• by location and adaptations

Where do many benthic organisms live?

• attached to hard surfaces

• in open water

• near the surface of the water

• attached to benthos

How many groups of aquatic organisms are discussed in this passage?

• 2

• 3

• 4

• 5

Which groups of aquatic organisms are discussed?

• phytoplankton and zooplankton

• plankton, nekton, and benthos

• plankton, nekton, benthos, and decomposers

• plankton, phytoplankton, zooplankton, nekton, and benthos

The food base of most aquatic ecosystems are

• worms

• phytoplankton

• zooplankton

• fish