Many dinoflagellates are photosynthetic and play a key role as producers in the food chains of the ocean.
(Many dinoflagellates; are; photosynthetic) (Many dinoflagellates; play; a key role as producers in the food chains of the ocean)
Many dinoflagellates Many dinoflagellates
are play
photosynthetic
a key role as producers in the food chains of the ocean