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Which of the following is NOT a mechanism for species coexistence? (1) Niche differentiation (2) Niche complementarity (3) Niche overlap (4) Amount of limiting resources is greater than the number […]

Generally organism tends to remain in realized niche. Under what condition realized niche can be greater than fundamental niche (1) Abundance of resources (2) Heterogeneity of resources (3) One species […]

In which of the following condition realized niche can exceed over fundamental niche? (1) Competition (2) Commensalisms (3) Ammensalism (4) Mutualism   Can the Realized Niche Exceed the Fundamental Niche? […]

Three bird species with similar habitat and diet preferences co-exist in a habitat. For these species, which one of the following statements is most likely to be correct? (1) The […]

In a 2-species interaction, assume that it leads to competition in habitat A, but to facilitation in habitat B. Which of the following is true about the niches of these […]

You observed the two species of barnacles, species 1 and species 2, occupy upper and lower strata of intertidal rocks, respectively. Only when species 2 was removed by you from […]

Gause’s ‘Competitive exclusion’ principle states that two species with identical niches cannot coexist indefinitely. Which of the following statements is the most appropriate regarding the validity of the principle? (1) […]

The Hutchinsonian concept of ecological niche is based on (1) microhabitat occupied (2) multidimensional hypervolume (3) role played in the ecosystem (4) a combination of role played and microhabitat occupied […]

Which one of the following terms is used for species that exploit the same resources in a similar manner? (1) Guild (2) Taxonomic order (3) Community (4) Assemblage   What […]

The diagram below shows the frequency distribution of three closely related bird species based on their beak sizes, across three different habitat patches A, B and C. All the three […]