Which of the subsequent pyramid can either be upright or inverted?
(a) Pyramid of energy
(b) Pyramid of number
(c) Ecological succession
(d) Age structure
The question was asked in examination.
This interesting question is from Ecological Pyramids in section Ecosystem of Biology – Class 12
Correct answer is (b) Pyramid of number
To elaborate: The pyramid of the number is inverted or upright, depending upon the nature of the food chain (organic and inorganic matter). The pyramid of the number represents the number of individuals at every level (producers forming the bottom and high carnivores forming the tip).