Largest spermatozoids are those of

Options

A. Pinus
B. Selaginella
C. Dryopteris
D. Cycas.

Answer

To solve the question about which organism has the largest spermatozoids, we can follow these steps:

### Step 1: Understand the Question
The question asks which of the given options has the largest spermatozoids. We need to analyze each option to determine which one fits this criterion.

### Step 2: Review the Options
The options provided are:
1. Pinus
2. Selaginella
3. Draptoris
4. Cycas

### Step 3: Analyze Each Option
- **Pinus**: This is a genus of conifers, and while it has sperm cells, they are not the largest.
- **Selaginella**: This is a genus of clubmosses, which also have sperm cells, but they are not the largest.
- **Draptoris**: This is not a commonly known genus in the context of spermatozoids, and it is less likely to have the largest spermatozoids.
- **Cycas**: This is a genus of cycads, and it is known for having the largest spermatozoids among the options provided.

### Step 4: Conclusion
Based on the analysis, the largest spermatozoids are found in **Cycas**. They are so large that they can be visible to the naked eye, which is a unique characteristic among the options given.

### Final Answer
The correct option is **Cycas**.

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