| A. Planktonic golden-yellow algae with soap box-like structure |
| B. Marine biflagellated protista |
| C. Appear yellow, green, brown in colour. |
| D. Biflagellated organisms with pellicle |
| E. Saprophytic (or) parasitic unicellular forms |
A) B and C only
B) B and E only
C) C, D and E only
D) A, B and C only
Correct Answer: A
Solution :
Most of them have two flagella; one lies longitudinally and the other transversely in a furrow between the wall plates. Very often, red dianoflagellates (Example: Gonyaulax) undergo such rapid multiplication that they make the sea appear red (red tides). Toxins released by such large numbers may even kill other marine animals such as fishes.
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