Ontogeny recapitulates phylogeny, this theory is called

Options

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

Explanation

To answer the question "Ontogeny recapitulates phylogeny, this theory is called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Ontogeny** refers to the development of an individual organism from embryo to adult.
- **Phylogeny** refers to the evolutionary history and relationships among species.

2. **Recall the Theory**:
- The phrase "ontogeny recapitulates phylogeny" suggests that the development stages of an embryo reflect the adult forms of its evolutionary ancestors.

3. **Identify the Origin of the Theory**:
- This theory was proposed by German naturalist Ernst Haeckel in 1866.

4. **Recognize the Name of the Theory**:
- The theory is commonly known as the **Biogenetic Law**.

5. **Evaluate the Options**:
- The question provides several options:
- A) Biogenetic law
- B) Law of embryology
- C) Law of acquired character
- D) Law of Bridges
- Based on our understanding, the correct answer is **A) Biogenetic law**.

6. **Eliminate Incorrect Options**:
- **Law of embryology** was proposed by Von Baer and does not specifically relate to the recapitulation of phylogeny.
- **Law of acquired character** refers to Lamarck's theory and is not relevant here.
- **Law of Bridges** does not pertain to this concept.

### Final Answer:
The theory "ontogeny recapitulates phylogeny" is called the **Biogenetic Law**.

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