Which of the following is not true for nutrition in $Amoeba$?

Differentiate between Dinoflagellates and Euglenoids.

$A$: Holophytic protistans are important phytoplanktons and they contribute $80\%$ of the total photosynthesis.
$R$: They lack chemosynthetic nutrition and utilize non-sulphur organic compounds as the source of electron and proton in carbon assimilation.

Pseudopodia in Protozoa is formed by the streaming of

Write the general characteristics of Euglenoids.

An $X$ reproduces in such great numbers that the water may appear red,producing red tides and killing large marine animals like $Z$. $X$ belongs to $Y$. Identify $X$,$Y$,and $Z$.