question_answer

The upright pyramid of number is absent in

A) pond                    

B)        forest   

C)        lake                       

D)        grassland

Correct Answer: B

Solution :

Pyramid of number represents the number of individuals per unit area at various trophic levels. It is always upright in grassland, pond and lake ecosystems. But in forest or single tree ecosystem, it is spindle-shaped and if parasitic, food chain is considered, then it will be an inverted pyramid.