Largest ovules, largest male and female gametes and tallest trees are found among

Options

A. angiosperms
B. tree ferns and some monocots
C. gymnosperms
D. dicots

Answer

To solve the question regarding where the largest ovules, largest male and female gametes, and tallest trees are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the group of plants that contains the largest ovules, the largest male and female gametes, and the tallest trees.

2. **Identifying Plant Groups**: The main groups of plants to consider are Gymnosperms and Angiosperms. Gymnosperms are known for having naked seeds, while Angiosperms have seeds enclosed in an ovary.

3. **Characteristics of Gymnosperms**:
- Gymnosperms are seed-bearing vascular plants.
- They produce seeds that are not enclosed in an ovary, hence referred to as "naked seeds."
- They include some of the tallest trees, such as conifers (e.g., pines, spruces).

4. **Reproductive Structures**:
- Gymnosperms have unisexual reproductive structures known as strobili (cones).
- The ovules in gymnosperms are typically larger than those found in angiosperms.
- The male and female gametes in gymnosperms are also larger compared to those in angiosperms.

5. **Comparison with Angiosperms**:
- Angiosperms (flowering plants) have smaller ovules and gametes compared to gymnosperms.
- They are characterized by having flowers and fruits, which gymnosperms do not possess.

6. **Conclusion**: Based on the characteristics and reproductive structures of gymnosperms, it can be concluded that the largest ovules, the largest male and female gametes, and the tallest trees are all found in Gymnosperms.

### Final Answer:
The correct answer is **Gymnosperms**.

---