Which of the following is not true about biodiversity?

Options

A. Maximum biodiversity occurs in tropics.
B. Introduction of exotic species may cause the loss of biodiversity.
C. Hotspots are the region with very high species richness and high degree of endemism.
D. The diversity of microbes is not biodiversity.

Answer

To solve the question "Which of the following is not true about biodiversity?", we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understand the Concept of Biodiversity:**
- Biodiversity refers to the variety of life forms on Earth, including different species of plants, animals, and microorganisms, as well as the ecosystems they form.

2. **Evaluate Each Option:**
- **Option 1:** "Maximum biodiversity occurs in tropics."
- This statement is true. Tropical regions, especially tropical forests, are known for having the highest levels of biodiversity due to favorable environmental conditions such as consistent sunlight, temperature, and humidity.

- **Option 2:** "Introduction of exotic species may cause the loss of biodiversity."
- This statement is also true. Exotic or alien species can outcompete native species for resources, leading to a decline in native biodiversity. This can disrupt local ecosystems.

- **Option 3:** "Hotspots are the region with very high species richness and high degree of endemism."
- This statement is true as well. Biodiversity hotspots are regions that are both rich in species and have a high number of endemic species (species found nowhere else). They are critical for conservation efforts.

- **Option 4:** "The diversity of microbes is not biodiversity."
- This statement is **not true**. Microbial diversity is an essential component of biodiversity. Biodiversity encompasses all forms of life, including microbes, plants, and animals.

3. **Conclusion:**
- After evaluating all options, we find that **Option 4** is the statement that is not true about biodiversity.

### Final Answer:
The statement that is not true about biodiversity is: **"The diversity of microbes is not biodiversity."**

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