question_answer 25)

  Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the (a) food web                      (b) ecological pyramid    (c) ecosystem                   (d) food chain

Answer:

                  (a) Organisms of a higher trophic level feeding on several types of organisms belongingto a lower trophic level constitute the food web. A series of organisms through which food energy flows in an ecosystem is called a food chain. An ecosystem consists of all the living beings of an area and non-living components of their environment. The graphic summary of the trophic structure and energy transfer in an ecosystem is called ecological pyramids.