Oils and Leucosine are characteristic stored food in :-

Options

A. Dinoflagellates
B. Euglenoids
C. Diatoms
D. None

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: The question lists three groups of organisms: dinoflagellates, euglenoids, and diatoms. All these belong to the kingdom Protista and are unicellular eukaryotes.

2. **Examine Dinoflagellates**: Dinoflagellates are primarily found in freshwater bodies and are known for their ability to perform photosynthesis. They store their food mainly in the form of unsaturated fatty acids and starch, which does not match the stored food types mentioned in the question.

3. **Examine Euglenoids**: Euglenoids are also freshwater organisms that can photosynthesize. They produce food and store it as starch, specifically a type called paramylon. Again, this does not correspond to the oils and leucosine mentioned in the question.

4. **Examine Diatoms**: Diatoms are another group of freshwater organisms that are photosynthetic and serve as primary producers in marine food chains. They store their food in the form of oils and leucosine, which directly matches the stored food types mentioned in the question.

5. **Conclusion**: Based on the analysis, the correct answer is that oils and leucosine are characteristic stored foods in diatoms.

**Final Answer**: Oils and leucosine are characteristic stored food in diatoms.

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