| 1. | It is a single-celled creature known as a dinoflagellate.
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| 2. | Some dinoflagellates may feed on other organisms as predators or parasites.
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| 3. | Chromerids, apicomplexans, and peridinin dinoflagellates have retained this organelle.
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| 4. | The most important groups of phytoplankton include the diatoms and dinoflagellates.
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| 5. | The dinoflagellate produces saxitoxin, which is a highly potent neurotoxin.
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| 6. | A number of dinoflagellates are known to have two nuclei.
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| 7. | Diatoms have been engulfed by dinoflagellates at least three times.
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| 8. | Of these, the best known are dinoflagellate detrital material.
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| 9. | Mixotrophic dinoflagellates are photosynthetically active, but are also heterotrophic.
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| 10. | In many cases the prime toxin producer is a dinoflagellate.
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