"Ontogeny repeats phylogeny"—is commonly called as:

Options

A. Biogenetic law
B. Law of embryology
C. Law of acquired characters
D. Law of Bridges

Explanation

To answer the question "Ontogeny repeats phylogeny"—is commonly called as:

### Step-by-Step Solution:

1. **Understanding the Terms**:
- **Ontogeny** refers to the development of an individual organism from the fertilized egg to its mature form.
- **Phylogeny** refers to the evolutionary history and the relationships among a group of organisms.

2. **Identifying the Theory**:
- The phrase "ontogeny repeats phylogeny" suggests that the development of an individual organism (ontogeny) reflects the evolutionary history (phylogeny) of that organism's species.

3. **Historical Context**:
- This concept was articulated by the scientist Ernst Haeckel in the 19th century, specifically around the year 1820. He proposed that embryonic development stages of an organism resemble the adult forms of its evolutionary ancestors.

4. **Common Name**:
- The phrase "ontogeny repeats phylogeny" is commonly referred to as the **Biogenetic Law**. This law posits that the development of an individual organism (ontogeny) mirrors the evolutionary development of the species (phylogeny).

5. **Conclusion**:
- Therefore, the answer to the question is that "Ontogeny repeats phylogeny" is commonly called the **Biogenetic Law**.

### Final Answer:
**Biogenetic Law**

---