Question

multiple select question

select all that apply

which relationships do not require a close association between microbes?

syntrophy
commensalism
mutualism
parasitism
amensalism

Explanation:

Distinguish symbiotic and nonsymbiotic relationships

Symbiotic relationships (mutualism, commensalism, parasitism) require close, physical, and often obligatory cohabitation between organisms. Nonsymbiotic relationships (syntrophy/synergism, amensalism/antagonism) are free-living associations where organisms do not require a close, intimate physical association to survive or interact.

Evaluate the given options

• Syntrophy (synergism): Nonsymbiotic, communal feeding relationship; does not require close physical association.
• Commensalism: Symbiotic; requires close physical association.
• Mutualism: Symbiotic; requires close physical association.
• Parasitism: Symbiotic; requires close physical association.
• Amensalism: Nonsymbiotic; one organism is harmed while the other is unaffected, typically mediated by released chemicals without requiring close physical contact.

Answer:

• Syntrophy (Correct answer)
• Commensalism
• Mutualism
• Parasitism
• Amensalism (Correct answer)