Question

Match the following:

Population Interaction	Example
A. Predation	I. Cuscuta and hedge plants
B. Commensalism	II. Balanus and Chathamalus
C. Parasitism	III. Cactus and moth
D. Competition	IV. Orchid and mango

• A. A-III; B-IV; C-I; D-II
• B. A-IV; B-III; C-II; D-I
• C. A-I; B-III; C-II; D-IV
• D. A-III; B-IV; C-II; D-I

Answer 1

The correct option is A A-III; B-IV; C-I; D-II

Competition is process in which the fitness and survival ability of one species is significantly lower in the presence of another species. Example: Balanus and Chathamalus

For instance, Chthamalus (a type of barnacle) is generally only found in the high tide zone -where it is best adapted to survival / most competitive. This is its realised niche. However, if a neighbouring type of barnacle (Balanus) is removed Chthamalus can actually occupy the entire intertidal zone -its fundamental niche.

Predation is a relation between two organisms in which one organism captures and feeds on other. Example: Cactus and moth

Commensalism is a relation between two organisms in which one benefits and the other neither derives benefit nor harms. Example: Orchid and mango

Parasitism is a relation between organisms in which one lives as a parasite on another and harms the host. Example: Cuscuta and hedge plants