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Question

If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to
  1. Commensalism
  2. Parasitism
  3. Amensalism
  4. Mutualism

A
Mutualism
B
Commensalism
C
Parasitism
D
Amensalism
Solution
Verified by Toppr

Commensalism refers to relationship wherein one organism is benefitted while other remains unaffected and is denoted by + 0.
Amensalism refers to association wherein one partner is inhibited while other remains nearly unaffected and is denoted by - 0.
Association of organisms which benefits one of the partners at the expense of other is called as parasitism and is denoted by + -.
Mutualism is association of organisms wherein both are benefitted and is denoted by + +.
Therefore, the correct answer is option B.

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