Question

An experiment showed that the growth of pillar coral decreased in warm water in which other organisms blocked sunlight. Which conclusion can be made based on these data?

A.
Pillar coral are unable to eat or digest zooxanthellae.

B.
Pillar coral do not need zooxanthellae or sunlight to survive.

C.
Pillar coral need sunlight so the zooxanthellae inside them can make food.

D.
Pillar coral need warm water so they can live free of zooxanthellae.

Answer 1

C.

Pillar coral need sunlight so the zooxanthellae inside them can make food.

Step-by-step explanation:

Pillar coral are zooxanthellate species, also meaning that they have a close relationship to the algae zooxanthellate.

Answer 2

C) Pillar coral need sunlight so the zooxanthellae inside them can make food.