Holophytic protistans are similar in the presence of (1) Primordial utricle (2) Chlorophyll-a (3) ? ? carotene
(4) Cell wall

Dear student

The correct option is 2.

Holophytic protistans are the organisms that synthesise their own food by the process of photosynthesis. They include diatoms, dinofalgellates, euglenoids. They are similar in the presence of pigment Chlorophyll-a. 

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