Question

use the evidence in the text to select the photosynthetic organism.
the bleeding tooth fungus oozes liquid that contains a red substance called atromentin. this colored substance can be used as a medicine to prevent blood from clotting.
netrium algae cells contain a substance called chlorophyll. this substance makes the netrium algae green.
a fireflys body contains a substance called luciferase that helps produce light. fireflies use this light to communicate during mating.

Explanation:

Photosynthetic organisms have chlorophyll which helps them perform photosynthesis. The bleeding tooth fungus is a fungus (fungi are not photosynthetic). Fireflies are insects (not photosynthetic). Netrium algae have chlorophyll, which is essential for photosynthesis.

Answer:

Netrium algae.