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 the population interaction represented by '+' and '-' signs, we can follow these steps:

### Step 1: Understand the Signs
- The '+' sign indicates a beneficial interaction for one of the populations involved.
- The '-' sign indicates a detrimental interaction for one of the populations involved.
- The '0' sign indicates a neutral interaction where neither population is affected.

### Step 2: Identify the Interactions
- We need to identify which type of population interaction corresponds to the '+' and '-' signs.

### Step 3: Analyze the Options
1. **Commensalism**: In this interaction, one organism benefits while the other is unaffected (0). Thus, it does not correspond to '+' and '-'.
2. **Parasitism**: In this interaction, one organism benefits (+) while the other is harmed (-). This matches our requirement of '+' and '-'.
3. **Mutualism**: In this interaction, both organisms benefit (+ and +). This does not match our requirement of '+' and '-'.
4. **Amensalism**: Here, one organism is harmed (-) while the other is unaffected (0). This does not match our requirement of '+' and '-'.

### Step 4: Conclusion
From the analysis, the interaction that corresponds to '+' (beneficial) and '-' (detrimental) is **Parasitism**.

### Final Answer
The population interaction represented by '+' and '-' refers to **Parasitism**.

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