Biogenetic laws/recapitulation theory was proposed by

Options

A. Weismann
B. Ernst Haeckel
C. Darwin
D. Malthus

Answer

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

1. **Understanding the Question**: The question asks who proposed the biogenetic laws or the recapitulation theory. This theory relates to the development and evolution of organisms.

2. **Analyzing the Options**: The options provided are Wiesmann, Ernst, Teichel, Darwin, and Malthus. We need to evaluate each option to identify the correct proposer of the theory.

3. **Evaluating Wiesmann**: Wiesmann is known for his germplasm theory, which states that only germ cells are involved in inheritance, not somatic cells. He did not propose the recapitulation theory.

4. **Evaluating Ernst Haeckel**: Ernst Haeckel is credited with the formulation of the biogenetic laws or recapitulation theory. He proposed that the development stages of an embryo resemble the adult forms of its evolutionary ancestors.

5. **Evaluating Darwin**: Charles Darwin is famous for his theory of natural selection and contributions to evolutionary biology, but he did not propose the recapitulation theory.

6. **Evaluating Malthus**: Thomas Malthus is known for his work on population growth and the Malthusian growth model, which is unrelated to the biogenetic laws.

7. **Conclusion**: After evaluating all options, it is clear that the correct answer to the question is Ernst Haeckel.

**Final Answer**: Ernst Haeckel proposed the biogenetic laws/recapitulation theory.

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