Phylogeny is the study of

Options

A. development of an individual
B. evolution of species
C. embryonic development of an organ
D. ecological adaptation of an organism

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Phylogeny":**
- Phylogeny refers to the evolutionary history and the relationships among species or groups of organisms.

2. **Focus on Evolution:**
- The primary aspect of phylogeny is the study of how species have evolved over time. This includes understanding the changes that have occurred in the genetic makeup of species.

3. **Evolutionary Relationships:**
- Phylogeny examines the evolutionary relationships among various species. This means it looks at how different species are related to one another through common ancestors.

4. **Common Ancestry:**
- A key concept in phylogeny is common ancestry. This means that species that are closely related share a common ancestor from which they have evolved.

5. **Conclusion:**
- Therefore, phylogeny is the study of the evolutionary relationships among species, focusing on their common ancestry and the changes that have occurred throughout their evolution.

**Final Answer:**
Phylogeny is the study of the evolutionary relationships among species, focusing on their common ancestry.

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