Population Interactions
Population Interactions: Overview
This topic covers concepts such as Gause's Principle, Population Interactions, Positive Interactions, Scavenging, Commensalism, Protocooperation, Mutualism, Negative Interactions, Parasitism, Predation, Competition among Species, etc.
Important Questions on Population Interactions
When an animals changes its body colour or body form and looks like another living organism, the phenomenon is called:


The egrets always forage close to where the cattle are grazing. The interaction between them can be called:

Which of the following interactions play a key role in keeping an eye on the number of the population?

Find the correct match of the organisms with the interaction they exhibit:
(a) Cuscuta growing on a shoe flower plant i)Brood Parasitism
(b) Mycorrhizae living on the roots higher plants. ii)Commensalism
(c) Clownfish living among the tentacles of a sea anemone. iii)Mutualism
(d) Koel laying her eggs in the crow’s nest. iv)Parasitism

Obligate parasites live on

Territoriality occurs as a result of

The symbiotic relationship of algae and fungus is found in

Many varieties of ants are engaged in fungus gardening. This helps them in

The Russian scientist Gause carried out experiments on three species of Paramecium by growing each species separately in identical culture conditions (Experiments and ) as well as in combination of two species grown together (Experiments and ). The results of the experiments are shown in the below graphs.
Based on the graphs, the correct statement(s) is/are

In a population interaction between the species and the species , which one of the following statements is correct?

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example.

The function of aposematic colouration is to

Which of the following is paired incorrectly?

The interaction between "Cuckoo and Crow" is an example for

Which of the following is not a parasitic adaptation in parasitic oragnisms?

Wasp laying eggs in the fig fruit represents which population interaction?

Name the population interaction that exists between Sea-anemone and clown fish.

Given the graphs below, the interaction between species and can be classified as

Wasp laying eggs in fig flower is an example of
