SSC MTS EXAM

Detailed explanation-1: -A pyramid of numbers shows graphically the population, or abundance, in terms of the number of individual organisms involved at each level in a food chain. This shows the number of organisms in each trophic level without any consideration for their individual sizes or biomass. The pyramid is not necessarily upright.

Detailed explanation-2: -The trophic structure of ecosystems is often described in terms of broadly defined levels consisting of primary producers, primary and secondary consumers, decomposers, and so on. Food webs, on the other hand, are described in terms of individual species.

Detailed explanation-3: -Definition. Trophic level is the relative position of an entity in the food chain. It forms the feeding positions in a food web or chain. All food webs and chains have at least two or three trophic levels. An ecological pyramid depicts how energy and biomass decrease from lower to higher trophic levels.

Detailed explanation-4: -a) In ecological pyramid primary producers (green plants) make up the first trophic level. b) The second trophic level consists of herbivores (plant eating organisms) these organisms get energy by eating primary producers and are called primary consumers.