Largest sperm in the plant kingdom is of :

Options

A. Pinus
B. Cycas
C. Ephedra
D. Sequoia

Answer

To solve the question regarding which plant has the largest sperm in the plant kingdom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options:
- A) Pinus (Gymnosperm)
- B) Cycas (Gymnosperm)
- C) Ephedra (Gymnosperm)
- D) Sequoia (Gymnosperm)

2. **Understand the Context**: All the options listed are Gymnosperms. Gymnosperms are a group of seed-producing plants that includes conifers and cycads.

3. **Focus on the Largest Sperm**: The question specifically asks for the largest sperm in the plant kingdom. Among Gymnosperms, it is known that Cycas has the largest sperm.

4. **Confirm the Characteristics of Cycas Sperm**:
- The sperm of Cycas is approximately 300 micrometers in size, making it the largest in the biological world.
- The shape of the sperm is described as top-shaped.
- It possesses multiple flagella, typically arranged in 5 to 6 grooves at one end.

5. **Select the Correct Option**: Based on the information gathered, the correct answer to the question is:
- **B) Cycas**

### Final Answer:
The largest sperm in the plant kingdom is that of **Cycas**.

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