Question

With reference to the ecological pyramids, consider the following statements :-
1. Unlike in the grazing food chain, the pyramid of biomass in the aquatic food chain is inverted.
2. In the forest ecosystem, the pyramid of numbers is always upright.
3. Since the sun is not a primary source of energy in a detritus food chain, therefore the pyramid of energy is inverted here.

Which of the above statement is/are incorrect?
(a) 1 only
(b) 1 and 2 only
(c) 2 and 3 only
(d) 1, 2 and 3

Answer 1

Option C - 2 and 3 only

More Information

☆ Ecological pyramids :-

• In the grazing food chain (many plants-many herbivores-fewer carnivores) the pyramid of biomass is upright (decreasing at each trophic level).

• In the aquatic food chain of Phytoplankton (low biomass)-zooplankton(more biomass)-predator(more biomass), the pyramid of biomass is inverted.

• Generally, the pyramid of number is upright in the forest ecosystem but, there are exceptions. For ìnstance, in a food chain starting from one tree( one Tree-many herbivores-few carnivores), the pyramid is neither upright nor inverted.

• Pyramid of energy in any food chain of any ecosystem is always upright.

________

Thank you

Answer 2

iam not sure but I think the answer is Option B