NEET BIOLOGY

Detailed explanation-1: -Dinoflagellates are classified as Protists within the division Dinoflagellata, most of the members of this division are charcterised by having, during at least one part of their life cycle, a motile stage with two dissimilar flagella.

Detailed explanation-2: -Gonyaulax is representative of a n important group of unicellular organisms, the Pyrrophyta (sometimes called Dinophyta). The common name for the group is the dinoflagellates. Like the Euglenophyta, the group contains both photosynthetic and non-photosynthetic forms.

Detailed explanation-3: -Noctiluca is a dinoflagellate. It is a colourless phototroph in which bioluminescence was reported. It carries out photosynthesis in day and exhibits bioluminescence in the night as regulated by circadian rhythm; hence it is called as “night light”.

Detailed explanation-4: -dinoflagellate, (division Dinoflagellata), any of numerous one-celled aquatic organisms bearing two dissimilar flagella and having characteristics of both plants and animals. Most are marine, though some live in freshwater habitats.

Detailed explanation-5: -This flagellum allows the dinoflagellate to turn and maneuver, as well as providing forward movement. The combined action of these two flagella may cause the dinoflagellate to slowly turn on its axis as it moves through the water, and this is where the group gets its name.