Dinoflagellates glow during dark because :-

Options

A. Their body contains large amount of phosphorus
B. Their body is covered by luminiscent layer
C. They absorb light and emit some part of it
D. Of chemical reaction between Luciferin- Luciferase

Answer

**Step-by-Step Solution:**

1. **Understanding Dinoflagellates**: Dinoflagellates are a group of unicellular organisms that are often referred to as bioluminescent algae. They are known for their ability to produce light.

2. **Definition of Bioluminescence**: Bioluminescence is the phenomenon where living organisms produce light. In dinoflagellates, this occurs due to specific chemical reactions.

3. **Key Components**: The two main components involved in the bioluminescence of dinoflagellates are:
- **Luciferin**: A pigment that is present in these organisms.
- **Luciferase**: An enzyme that catalyzes the reaction involving luciferin.

4. **The Chemical Reaction**: When luciferin reacts with luciferase, it produces light. This reaction is unique because it generates light without producing heat, which is known as "cold light."

5. **Conclusion**: The glowing of dinoflagellates in the dark is primarily due to the chemical reaction between luciferin and luciferase. Therefore, the correct answer to the question is that it is a chemical reaction between luciferin and luciferase.

**Final Answer**: Dinoflagellates glow in the dark due to a chemical reaction between luciferin and luciferase.

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