Chlorohydra is found to be green in color. This green color is due to Chlorella algae having symbiotic association with Hydra. Do this Chlorella have Chlorophyll pigment? Can we test Chlorophyll pigment from Hydra? Can we test photosynthesis using Chlorohydra?
Melvin Calvin, (born April 8, 1911, St. Paul, Minnesota, U.S.—died January 8, 1997, Berkeley, California), American biochemist who received the 1961 Nobel Prize for Chemistry for his discovery of the chemical pathways of photosynthesis.
Lets look at Melvin Calvin and his experiments with photosynthesis.
Picture of Chlorohydra shared by @sakshiconsultant2002