Which of the following is not a characteristic of dinoflagellates?
| 1. | Mostly fresh water and photosynthetic |
| 2. | Cell wall with stiff cellulosic plates |
| 3. | Two flagella |
| 4. | Various colored pigments in the cell |
The phenomenon of red tides is associated with blooms of:
| 1. | Zooxanthelle | 2. | Gonyaulax |
| 3. | Blue green algae | 4. | Ctenoplana and Beroe |