Unit 6A - Pelagic Zone

During a phytoplankton bloom, the organisms produce a flower.

• False

• True

Upwelling is bad for marine organisms like fish.

• False

• True

Changing winds cause upwelling and red tides.

• True

• False

Diatoms are associated with red tide.

• True

• False

Meroplankton are not competitive with adult life forms.

• False

• True

The entire feeding cycle of marine animals is driven by vertical migration.

• True

• False

Which is NOT a characteristic of the pelagic zone?

• largest marine ecosystem by size

• stratified water masses

• more oxygen and food

• most complex food webs

Which is NOT a dominant group in the pelagic zone?

• shellfish

• whales

• fish

• plankton

The zooplankton niche is

• consumers

• producers

• decomposers

• carnivores

The phytoplankton niche is

• carnivores

• decomposers

• consumers

• producers