What is polyembryony and how can it be commercially exploited?

Explanation

### Step-by-Step Solution:

1. **Definition of Polyembryony**:
- Polyembryony refers to the phenomenon where more than one embryo develops from a single fertilized egg or ovule. The term is derived from "poly," meaning many, and "embryony," referring to embryos.

2. **Occurrence of Polyembryony**:
- This condition can occur naturally in certain plant species, where multiple embryos are formed within a single seed. It can also be induced artificially through various techniques in plant breeding.

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