Question

Match the column Column I Column II

A) + +	1) Commensalism
B) + -	2) Competition
C) - -	3) Parasitsm
D) + 0	4) Mutualism

• A. A-1, B-2, C-3, D-4
• B. A-2, B-3, C-1, D-4
• C. A-4, B-3, C-2, D-1
• D. A-3, B-2, C-1, D-4

Answer 1

The correct option is C A-4, B-3, C-2, D-1

These are all types of relations.

(+ +) Mutualism is where both the organisms are benefitted. eg. Lichens

(+ -) Parasitism is when one organism benefits and the other one is harmed. eg. Plasmodium and humans

(- -) Competition is when both are harmful to each other. eg. cheetahs and lions

(+ 0) Commensalism is when one organism is benefitted and the other is not effected. eg. clown fish and sea anemone