Explain how the study of embryos of vertebrates provide evidence for their common ancestry.

Explanation

### Step-by-Step Solution:

1. **Introduction to Embryonic Development**:
- The study of embryonic development in vertebrates reveals significant similarities during the early stages of development. This is crucial because it indicates that different vertebrate species share a common ancestry.

2. **Observation of Early Embryos**:
- When we observe the embryos of various vertebrates, such as humans, chickens, and fish, we notice that they exhibit similar structures and features during their early developmental stages. For instance, all vertebrate embryos have structures like pharyngeal arches and a notochord.

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