Geotropism was discovered by

Options

A. Darwin
B. Frank
C. Haberlandt
D. Gercke.

Answer

**Step-by-Step Solution:**

1. **Understanding Geotropism**:
- Geotropism, also known as gravitropism, refers to the directional growth of plants in response to gravity. Roots typically grow downwards (positive geotropism) while stems grow upwards (negative geotropism).

2. **Etymology of the Term**:
- The term "geotropism" is derived from the Greek word "geo," meaning earth, which indicates that this phenomenon is related to the gravitational pull of the Earth.

3. **Historical Context**:
- The study of plant movements and responses to environmental stimuli has been a significant area of research in botany.

4. **Key Discoveries**:
- Among the scientists who studied plant movements, Charles Darwin is credited with the discovery of geotropism. His work laid the foundation for understanding how plants respond to gravitational forces.

5. **Conclusion**:
- Therefore, the correct answer to the question "Geotropism was discovered by" is Charles Darwin.

**Final Answer**: Geotropism was discovered by Charles Darwin.

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