In_________the seeds are naked while in_________the seeds are enclosed in an ovary.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for two groups of plants: one where the seeds are naked and another where the seeds are enclosed in an ovary.

2. **Identifying the Groups**:
- The first group where seeds are naked is called **Gymnosperms**. In Gymnosperms, seeds are not enclosed in any protective structure; they are exposed or "naked."
- The second group where seeds are enclosed in an ovary is called **Angiosperms**. In Angiosperms, seeds develop within a protective ovary, which is part of the flower.

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