Question

(-, -) represents what type of population interaction?

• A. Predation
• B. Parasitism
• C. Commensalism
• D. Competition

Answer 1

The correct option is D Competition

Competition is a type of population interaction in which the fitness of one species is significantly lower in the presence of another species. It occurs when more than one species competes for the same resources that are limited and usually has a negative effect on both the interacting species.

Hence, it is represented as (-, -).

‘+’ sign for beneficial interaction, ‘-’ sign for detrimental and ‘0’ for neutral interaction.

Predation is a type of interaction where an organism belonging to one species (the predator) kills and eats another organism belonging to another species (its prey).

Hence, it is represented as (+, -).

Parasitism is a type of population interaction between two living species in which one organism is benefited at the expense of the other. The organism that is benefitted is called the parasite, while the one that is harmed is called the host.

Hence, it is represented as (+, -).

Commensalism is a type of population interaction in which one species benefits and the other is neither harmed nor benefited.

Hence, it is represented as (+, 0).