Question

The inverted ecological pyramid can be seen in case of
A. Pyramids of number in a grassland
B. Pyramid of biomass in a fallow land
C. Pyramid of biomass in a lake
D. Energy pyramid in a spring.

Answer 1

An ecological pyramid is a graphical representation designed to show the relationship between different organisms in the ecosystem. There are three different types of ecological pyramid. Pyramid of the number, pyramid of biomass and pyramid of productivity. The inverted pyramids are seen where primary producers are makeup-less biomass than primary consumers.

Complete answer:
The pyramid of ecosystem shows the relationship between different organisms in the ecosystem. It was first described by Charles Elton. There are three different types of ecological pyramid. Pyramid of the number, pyramid of biomass, Pyramid of productivity.
Pyramid of the number shows the total number of the individual organisms at each level of the food chain. It is not always in the regular pyramid shape. Pyramid of biomass measures the amount of energy converted into living tissue at different trophic levels. Pyramid of productivity shows the productivity of the biomass at each trophic level or the low of energy through the food chain.
Pyramid of biomass is inverted since primary producers make up less biomass than primary consumers. The inverted pyramid of biomass is seen in a lake or pond ecosystem, as the phytoplankton is less as compared to the small herbivorous fish. Pyramid number in the grassland is upright, as the main producer's grass is always more. Pyramid of energy in spring is also upright.

Hence, the correct answer is option (C).

Note: An ecological pyramid is a graphical representation to show the relationship between the organisms of the ecosystem. Pyramid of biomass is inverted in a pond or lake as the primary producers make up less biomass than primary consumers. The biomass of phytoplankton is less as compared to that of small herbivorous fish, so the pyramid of biomass is inverted in a lake or pond.