NEET BIOLOGY

Detailed explanation-1: -The two main classes of phytoplankton are dinoflagellates and diatoms . Dinoflagellates use a whip-like tail, or flagella, to move through the water and their bodies are covered with complex shells.

Detailed explanation-2: -They are motile. Dinoflagellates swim by means of two flagella, movable protein and microtubule strands that propel the cell through the water. The longitudinal flagellum extends out from the sulcal groove of the hypotheca (posterior part of cell); when it whips back and forth it propels the cell forward.

Detailed explanation-3: -The dinoflagellates (Greek dinos “whirling” and Latin flagellum “whip, scourge") are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata and are usually considered algae. Dinoflagellates are mostly marine plankton, but they also are common in freshwater habitats.

Detailed explanation-4: -Dinoflagellates can best be described as tiny, single-celled organisms that have a long body with two arm-like flagella.