Sketch the following pyramids.
(i) Pyramid of number    (ii) Pyramid of biomass.   (iii) Pyramid of energy.

Construct a pyramid of biomass, starting with phytoplankton. Label three trophic levels. Is the pyramid upright or inverted? Why?

Define ecological pyramids and describe with examples, pyramids of number and biomass.

45. By the process of leaching the water soluble inorganic nutrients  get precipitated as ?

Which nature of humus makes it a good reservoir of nutrients?

What is a sere?

Most part of energy is lost in which form during the energy flow in the ecosystem?