Q. Consider the following statements regarding energy flow in ecosystem:
1. Energy always flows from lower to higher trophic level.
2. It never flows in the reverse direction.
Which of the statements given above is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C
Notes:

Trophic level interaction deals with how the members of an ecosystem are connected based on nutritional needs.  

  • Energy flows through the trophic levels: from producers to subsequent trophic levels.  
  • This energy always flows from lower (producer) to higher (herbivore, carnivore etc.) trophic level.  
  • It never flows in the reverse direction that is from carnivores to herbivores to producers. 

Source: NCERT