Ocean Food Webs

Question 1

If a small fish that eats zooplankton disappears from an ocean food web, which of the following is most likely to happen?

Accepted Answer

Zooplankton would become more abundant, and the larger predators that ate the small fish would have less food.

Answer

Nothing would change because other fish would quickly fill the missing role.

Answer

Only the phytoplankton would disappear from the ocean.

Answer

All the other animals would immediately die, leaving the ocean empty.

Question 2

Which choice describes a food web instead of a simple food chain in the ocean?

Accepted Answer

Phytoplankton are eaten by zooplankton and tiny shrimp; both zooplankton and shrimp are eaten by small fish; small fish are eaten by seals and by larger fish; seals and the larger fish are eaten by orcas

Answer

Seaweed → sea urchin → sea otter → killer whale

Answer

Phytoplankton → zooplankton → small fish → dolphin

Answer

Algae → sea snail → fish → shark

Question 3

Which choice shows two correct ways that energy can move through an ocean food web, starting with phytoplankton?

Accepted Answer

Phytoplankton → Zooplankton → Small fish → Seal, and Phytoplankton → Zooplankton → Small fish → Shark

Answer

Zooplankton → Phytoplankton → Small fish → Seal, and Phytoplankton → Small fish → Seal → Shark

Answer

Phytoplankton → Zooplankton → Shark → Small fish, and Phytoplankton → Small fish → Seal → Zooplankton

Answer

Phytoplankton → Small fish → Zooplankton → Seal, and Phytoplankton → Zooplankton → Shark → Small fish

Try three questions

If a small fish that eats zooplankton disappears from an ocean food web, which of the following is most likely to happen?

Which choice describes a food web instead of a simple food chain in the ocean?

Which choice shows two correct ways that energy can move through an ocean food web, starting with phytoplankton?

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