Define phylogeny

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Phylogeny**: Phylogeny refers to the evolutionary history of a particular organism or group of organisms. It encompasses the relationships and lineage of species as they evolve over time.

2. **Tracking Evolutionary History**: To understand phylogeny, one must track the evolutionary history of an organism, which includes identifying its ancestors and the evolutionary changes that have occurred throughout its development.

3. **Common Ancestors**: Central to the concept of phylogeny is the idea of common ancestors. Phylogeny illustrates how different species have diverged from a common ancestor over time, leading to the diversity of life we see today.

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