10% energy was passed on if the producer has 40,000 kcal of energy and the primary consumer 4000 Kcal.
The right answer is option 2.
Explanation:
The producer is the initiator of food chain in a food chain and pyramid.
The amount of energy transferred or pass on to the other level or higher level is 10%. The 90% percent energy is being consumed by organism of the trophic level in carrying out metabolic processes, reproduction etc.
The heat gets dissipated only a small amount reaches the other trophic level.
This logic is also called 10% rule of energy transfer.
So, the producer has 40,000 Kcal of energy
primary consumer comes just after producer as it is a herbivore.
so,
x 40000
= 4000 Kcal
Thus 10% of the energy is passed on.