If $'+'$ sign is assigned to beneficial interaction, $'-'$ sign to detrimental and $'O'$ sign to neutral interaction, then the population interaction represented by $'+'\, '-'$ refers to
mutualism
amensalism
commensalism
parasitism.
$A$ : The interaction between sea anemone and clown fish is commensalism.
$R$ : The fish gets protection from predators but anemone does not appear to derive any benefit.
Which of the following is incorrect w.r.t. competition?
There is more competition for survival between
Describe competition.
Which one of the following is most appropriately defined?