9 Week Review

Coral Reefs are found in shallow, clear, warm water because there is

• lots of sunlight for the symbiotic algae (zooxanthellae) that live with the polyps

• not lots of sunlight for the symbiotic algae (zooxanthellae) that live with the polyps

• no good reason, it just feels nice

• all of these choices are correct

Coral reefs are endangered by

• climate change

• overfishing

• pollution

• all of the above

What are the two kinds of coral?

• Blue and yellow
• Hard and slimy
• Hard and soft
• Soft and delicate

What role do algae play in a coral reef?

• They reduce the amount of carbon dioxide in the water.

• They supply food for the corals.

• They help the stony corals and soft corals live together.

• They protect the corals from disease.

Which has fur covering their front flippers?

• sea lions
• seals
• walruses

Which has long front flippers and can swing their hind flippers forward to walk on land?

• sea lions
• seals
• walruses

Which uses their front flippers to swim?

• sea lions
• seals

Which uses their back flippers to swim?

• sea lions
• seals

Which is NOT true about marine mammals?

• They have hair.
• They are endothermic
• They can breathe underwater.
• They feed their babies milk.

Adult walruses have ______. These long teeth never stop growing. 

• ears
• tusks