Question

All of the following statements are true for ecological pyramid except

• A. Energy available at a lower trophic level is always more than that at a higher level
• B. The pyramid of numbers in a parasitic food chain is inverted
• C. Pyramid of biomass in sea is upright normally
• D. In a tree ecosystem, squirrels are primary consumers and ticks are secondary consumers

Answer 1

Answer: (C)

Pyramid of biomass in sea is upright normally

An ecological pyramid is a graphical representation of the biomass or bio productivity at each trophic level in a given ecosystem.

Pyramid of the number shows graphically the population of each level in a food chain. It may be upright (e.g. Grassland ecosystem), inverted (parasitic ecosystem) or dumbbell-shaped (forest ecosystem).

An energy pyramid is a graphical model of energy flow in a system. Energy pyramids begin with producers on the bottom and proceed through the various trophic levels. The consumers at the top of a food pyramid have much less energy available to support them than those closer to the bottom.

Marine environments (sea, ocean) have inverted biomass pyramids. In particular, the biomass of consumers is larger than the biomass of primary producers.

So, the answer is C.