Gause's law is related to:

In an aquarium,two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gause's Principle,one of the species is to be eliminated in due course of time,but both are surviving well in the aquarium. Give possible reasons.

Which of the following interactions results in a negative effect (harm) for both interacting species?

Name the association in which one species produces a poisonous substance or a change in environmental conditions that is harmful to another species.

What is the effect of a parasite on the host?

Competition is best defined as a process in which the fitness of one species (measured in terms of its '$r$',the intrinsic rate of increase) is significantly: