All the energy present at a particular level in the food chains of an ecosystem is called 

(C) Ecological pyramid

(B) food web

B) Food relationship

(D) 10 – 20 %

Answer is (C) 5000 KJ

(B) Energy level

D) all the given

Answer is (B) River

(iii) Both assertion and reason are wrong statement.

(a) Reduction in primary productivity. No biomass available for consumption by higher trophic levels/heterotrophs (b) Increase in primary productivity and biomass of producers. Carnivores population will subsequently dwindle due to food...