If '+' sign is assigned to beneficial interaction '-' sign detrimental and '0' sign to neutral interaction, then population interaction by '+', '-' refers to "

Options

A. Commensalism
B. Parasitism
C. Mutualism
D. Amensalism

Answer

To solve the question regarding population interactions represented by '+' (beneficial), '-' (detrimental), and '0' (neutral), we can analyze the types of interactions and their implications step by step.

### Step-by-Step Solution:

1. **Understanding the Signs**:
- The '+' sign indicates a beneficial interaction for one organism.
- The '-' sign indicates a detrimental interaction for one organism.
- The '0' sign indicates a neutral interaction where neither organism is affected.

2. **Identifying the Interactions**:
- **Commensalism**: One organism benefits while the other is unaffected. This interaction would be represented as '+ 0'.
- **Parasitism**: One organism benefits at the expense of another, which is harmed. This interaction would be represented as '+ -'.
- **Mutualism**: Both organisms benefit from the interaction. This would be represented as '+ +'.
- **Amensalism**: One organism is harmed while the other is unaffected. This would be represented as '- 0'.

3. **Analyzing the Question**:
- The question specifically asks for the interaction represented by '+' and '-'.
- Based on our analysis, the interaction that fits this description is **Parasitism**, where one organism (the parasite) benefits while the other organism (the host) is harmed.

4. **Conclusion**:
- Therefore, the population interaction represented by '+' and '-' refers to **Parasitism**.