Zoochlorellae and zooxanthallae present in Hydra are

Options

A. Symbionts in nutritive cells
B. Symbionts in the gut
C. Symbionts in cnidoblasts
D. Organisms that provide hypnotoxin

Answer

A

Explanation

Certain species of hydra such as chlorohydra viridissima have unicellular symbiotic algae called zoochlorellae and zooxanthallae in the gastrodermal cells.