Question

What is the interaction where one species is harmed and the other is unaffected?

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

Hint:

Ecological interaction symbols: \(+/+\) Mutualism, \(+/0\) Commensalism, \(+/-\) Parasitism, \(-/0\) Amensalism.

Answer 1

The Correct Option is C

Concept: In ecology, different species interact with each other in various ways. These interactions may benefit, harm, or have no effect on the participating species.

Step 1: Understanding amensalism. Amensalism is a type of ecological interaction in which:
• One species is harmed.
• The other species is neither benefited nor harmed.

Step 2: Example of amensalism. A common example is the fungus Penicillium, which produces antibiotics that inhibit the growth of bacteria. The bacteria are harmed, while the fungus remains unaffected.

Step 3: Comparison with other interactions.
• Mutualism – both species benefit.
• Commensalism – one benefits and the other is unaffected.
• Parasitism – one benefits while the other is harmed. Thus, the interaction where one species is harmed and the other is unaffected is called Amensalism.