Read the two statements A and B. Statement A: Diversity observed in the entire geographical area is called gamma diversity. Statement B: Biodiversity decreases from high altitude to low altitude.

Options

A. Statement A is correct, B is wrong.
B. Statement B is correct, A is wrong.
C. Both the statements A and B are correct.
D. Both the statements A and B are wrong.

Answer

To analyze the two statements A and B, we will evaluate each statement based on the definitions and concepts related to biodiversity.

### Step 1: Understand Statement A
- **Statement A**: "Diversity observed in the entire geographical area is called gamma diversity."
- **Explanation**: Gamma diversity refers to the total species diversity within a landscape or geographical area. It encompasses all the species in a particular region, making this statement accurate.

### Step 2: Understand Statement B
- **Statement B**: "Biodiversity decreases from high altitude to low altitude."
- **Explanation**: This statement is incorrect. Generally, biodiversity tends to increase as you move from higher altitudes to lower altitudes. This is because lower altitudes typically have more varied habitats and a greater availability of resources, supporting a wider range of species.

### Step 3: Conclusion
- Based on the evaluations:
- **Statement A** is correct.
- **Statement B** is incorrect.

### Final Answer
The correct answer is that Statement A is true, and Statement B is false.

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