Choose the wrong statements
I. Two closely related species may not live in same habitat
II. The more dissimilar the niches of two species the stronger is their competition
III. Two species can occupy the same niche in geographical area
IV. No two species may occupy the same ecosystem

Options

A. I,II and III
B. II,III and IV
C. I,II,III and IV
D. III and IV

Answer

To solve the question of identifying the wrong statements among the given options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement I: Two closely related species may not live in the same habitat.**
- This statement is **correct**. Closely related species may have different ecological requirements and may not share the same habitat due to competition for resources or other ecological factors.

2. **Statement II: The more dissimilar the niches of two species, the stronger is their competition.**
- This statement is **wrong**. If the niches of two species are dissimilar, they are likely to utilize different resources and therefore will not compete strongly with each other. Competition arises primarily when species share similar niches and compete for the same resources.

3. **Statement III: Two species can occupy the same niche in a geographical area.**
- This statement is **wrong**. According to the competitive exclusion principle, two species that occupy the same niche cannot coexist indefinitely because they will compete for the same resources. One species will typically outcompete the other.

4. **Statement IV: No two species may occupy the same ecosystem.**
- This statement is **wrong**. Many different species can and do occupy the same ecosystem. Ecosystems are characterized by a diversity of species that interact with each other and their environment.

### Conclusion:
The wrong statements are:
- Statement II: The more dissimilar the niches of two species, the stronger is their competition.
- Statement III: Two species can occupy the same niche in a geographical area.
- Statement IV: No two species may occupy the same ecosystem.

Thus, the answer is that statements II, III, and IV are incorrect.