Coral Reefs

Corals obtain food using all of the following except

• mutualistic relationship with zooxanthellae

• absorbing DOM from water

• Capturing zooplankton and detritus

• scavenging the bottom for the dead

When corals expel zooxanthellae it is called

• subsiding

• Nitrogen fixation

• eutrophication

• Bleaching

Which is the outer, steep margin of a coral reef?

• reef crest

• reef slope

• reef flat

• lagoon

Which are the most important primary producers in a coral reef?

• Zooxanthellae and alge

• Zooxanthellae and seagrasses

• Dinoflagellates and seaweeds

• Diatoms and Seaweeds

Corals that do not build in reefs and often lack zooxanthellae are known as

• ahermatypic

• hermatypic

• anthozoans

• hydrozoans

Humans damage corals reefs through all of the following actions except:

• Increasing sediment influx through mining and logging

• Transmitting infections from open wounds while snorkeling

• Runoff containing pesticides and toxic wastes

• Nutrients influx from sewage and agriculture

Patch reefs, coral knolls and pinnacles may punctuate a sheltered body of water called a(n)

• atoll

• lagoon

• cay

• reef slop

What are the three main types of coral Reefs?

• fringing, barrier, corals

• barrier, corals, altolls

• fringing, barrier, atoll

• atoll, fringing, corals

what are coral Reefs made of?

• small amount of DOM or limestones, deposited by orgabisms

• Large amount of DOM or limestones, deposited by orgabisms

• small amount of calcium carbonate or limestones, deposited by organisms

• huge amounts of calcium carbonate or limestones, deposited by organisms

How are Atolls form?

• As a ring of coral surrounds an undersea volcano that has risen above the water's surface

• scientist haven't figured out how they formed

• The coral develops into the sand and starts to form into a ring shaped figure

• The fishes near the coral helps Atolls form