Question

multiple choice question

which relationship does not require a particularly close association between microbes or between microbes and other organisms?

amensalism
commensalism
parasitism
mutualism

Explanation:

Define symbiotic vs. nonsymbiotic relationships

Symbiotic relationships (mutualism, commensalism, parasitism) are close, intimate, and often obligatory physical associations between different species. Nonsymbiotic relationships (such as synergism and antagonism/amensalism) involve free-living organisms that do not require a close, continuous physical association to interact.

Evaluate the given options

• Amensalism: A nonsymbiotic relationship where one organism is harmed or inhibited while the other remains unaffected (e.g., production of antibiotics by one microbe inhibiting another). It does not require a close physical association.
• Commensalism: A symbiotic relationship requiring a close physical association where one partner benefits and the other is unaffected.
• Parasitism: A symbiotic relationship requiring a close physical association where one organism benefits at the expense of the host.
• Mutualism: A symbiotic relationship requiring a close physical association where both organisms benefit.

Answer:

• (A) Amensalism (Correct answer)
• (B) Commensalism
• (C) Parasitism
• (D) Mutualism