Question:

Identify the incorrect statement from the following :

Updated On: Apr 17, 2024
  • Pyramids of number and biomass may be either upright or inverted
  • Food chains are generally short with few trophic levels as only 10% of the energy is transferred to each trophic level from the lower trophic level
  • Pyramid of energy is mostly upright, but sometimes it may be inverted.
  • Pyramid of biomass in sea is generally inverted as the biomass of fish far exceeds that of phytoplanktons.
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The Correct Option is C

Solution and Explanation

Pyramid of energy is a graphic representation of amount of energy trapped per unit time and area in different trophic levels of a food chain with producers forming the base and top carnivores the tip. The energy content is expressed as kcal/$m^2$/yr.
Pyramids of energy are always upright, since maximum energy content is present in the producers. From there, only 10% of energy is used by the next trophic level. Every
trophic level gets only 1 0 % energy of the lower trophic level. Energy level always decreases along a food chain hence always upright pyramid is obtained.
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Concepts Used:

Ecosystem

An ecosystem is a structural and functional unit of ecology where the living organisms come in to interact with each other and the surrounding environment.

Structure of the Ecosystem:

The structure of an ecosystem is distinguished by the organization of both biotic and abiotic components. This involves the distribution of energy in our environment. It also comprises the climatic conditions prevailing in that particular environment. 

There are two main components of the structure of an ecosystem, namely: 

  • Biotic Components
  • Abiotic Components

The biotic and abiotic components are interconnected in an ecosystem. It is an open system where the energy and components can flow through the boundaries.