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Which of the following options lists ecosystems in increasing order of plant productivity per day per unit leaf area? (1) Tropical forests, hot deserts, temperate forests (2) Hot deserts, temperate […]

58. Which of the following is the correct increasing order for the daily net primary productivity (NPP) per unit leaf area in different ecosystems ? (1) Deserts < Temperate forests […]

Which of the following is a correct ranking of ecosystems based on the roots: shoot ratio of plants? (1) Tropical wet forest > Tropical dry forest > Temperate grassland > […]

Given below is an ecological pyramid. The above pyramid represents: (1) Pyramid of number of a parasitic food chain and pyramid of biomass of a pond ecosystem (2) Pyramid of […]

Which one of the following statement is NOT correct? (1) Herbivores enhance the productivity of a productive ecosystem and reduce the productivity of an unproductive ecosystem. (2) Detritus based food […]

Following are some of the generalizations regarding energy flow in an ecosystem: A. Assimilation efficiency of carnivores is higher than herbivores. B. Consumption efficiency of aquatic herbivores is higher than […]

Following are certain statements regarding energy efficiencies of ectotherms and endotherms: A. Ectotherms have high assimilation efficiency but low production efficiency. B. Ectotherms have low assimilation efficiency but high production […]

Which of the following is true about the Digestion Efficiency (DE)-(assimilation/consumption) and Ecological Efficiency (EE) (production/consumption) of ectotherms and endotherms? (1) Endotherms have a high DE and ectotherms have a […]

Lindeman’s efficiency between trophic levels is depicted by the formula: Efficiency = A/B Where, A and B, respectively are: (1) ‘assimilation at trophic level n’ and ‘assimilation at trophic level […]

Which of the following set of observations is true with reference to a comparison of aquatic (A) and terrestrial (T) ecosystems? (1) Number of trophic levels is more in A […]