Which of the following is incorrect w.r.t competition ?

Options

A. Resources need not be limiting for competition to occur
B. Competitive species may evolve mechanism that promote their co-existance
C. Connel's field experiment is an example of competitive release
D. Only closely related species can show competition

Answer

To determine which statement regarding competition is incorrect, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Competition**:
- Competition is an interaction between organisms or species where both parties are harmed. It typically occurs when resources are limited, such as food, water, or territory.

2. **Analyzing the Statements**:
- **Statement 1**: "Resources need not be limiting for competition to occur."
- This statement is misleading because competition generally arises when resources are limited, although it can occur in other contexts.

- **Statement 2**: "In competitive species, evolved mechanisms promote their co-existence."
- This statement is true. Species can evolve mechanisms to coexist despite competition, such as resource partitioning.

- **Statement 3**: "Kernels, field experiment is an example of competitive release."
- This statement is true. Joseph Connell's study on barnacle species is a classic example of competitive release.

- **Statement 4**: "Only closely related species can show competition."
- This statement is incorrect. Competition can occur between both closely related species (intraspecific competition) and distantly related species (interspecific competition).

3. **Identifying the Incorrect Statement**:
- Based on the analysis, the incorrect statement is **Statement 4**: "Only closely related species can show competition."

### Conclusion:
The answer to the question is that the incorrect statement regarding competition is that only closely related species can show competition.

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