Euglenoids have two photosensitive structures one is eye spot. The other is

Options

A. Pusule
B. Basal granule
C. Paraflagellar body
D. Pyrenoid

Answer

**Step-by-Step Solution:**

1. **Identify the Photosensitive Structures in Euglenoids**: Euglenoids, specifically Euglena, possess two main photosensitive structures that help them respond to light.

2. **First Structure - Eye Spot**: The first photosensitive structure is the eye spot (also known as the stigma). This structure is sensitive to light and helps the organism detect the direction of light.

3. **Second Structure - Para-Flagellar Body**: The second photosensitive structure is the para-flagellar body. This structure is located near the flagella and is also sensitive to light. It allows Euglena to respond to specific wavelengths of light, facilitating phototaxis, which is the movement towards light.

4. **Function of the Para-Flagellar Body**: The para-flagellar body helps Euglena to orient itself in the direction of light, allowing it to move towards areas with optimal light for photosynthesis.

5. **Conclusion**: Therefore, the two photosensitive structures in Euglenoids are the eye spot and the para-flagellar body.

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