A chemical believed to be involved in flowering is

Options

A. ethylene
B. cytochrome
C. florigen
D. 2, 4-D

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks for a chemical that is believed to be involved in the process of flowering in plants.

2. **Reviewing the Options:** The options provided are:
- A) Ethylene
- B) Cytochrome
- C) Fluorescein
- D) 2,4-D
- E) Florigen

3. **Analyzing Each Option:**
- **Ethylene:** This is a plant hormone known to influence various processes, including fruit ripening and senescence, but it is not primarily recognized as a flowering hormone.
- **Cytochrome:** This is a group of heme-containing proteins involved in electron transport and energy production, not directly related to flowering.
- **Fluorescein:** This is a synthetic dye and not a plant hormone.
- **2,4-D:** This is a synthetic auxin used in herbicides and does not specifically promote flowering.
- **Florigen:** This is a hypothetical flowering hormone that was proposed to be synthesized in response to favorable environmental conditions and is believed to be transported to the flowering sites in plants.

4. **Identifying the Correct Answer:** Based on the analysis, Florigen is the chemical that is specifically believed to be involved in the flowering process.

5. **Conclusion:** Therefore, the correct answer to the question is **Florigen**.

**Final Answer:** Florigen

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