Practice free Ecosystem (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is $100x\,(kcal\,m^{-2})\,yr^{-1}$, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
Lindeman's 10 % rule: $100x \to 10x$ (2nd) $\to x$ (3rd).
Given below are two statements:
Statement I: The primary source of energy in an ecosystem is solar energy.
Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).
In the light of the above statements, choose the most appropriate answer:
Statement I is correct. Statement II is wrong: the rate of production of organic matter during photosynthesis is gross primary productivity (GPP); NPP = GPP − respiratory loss.
Who is known as the father of Ecology in India?
Ramdeo Misra is regarded as the "father of Ecology in India".
Which of the following is the unit of productivity of an Ecosystem?
Productivity is a rate (energy fixed per unit area per unit time), so its unit is $(\text{kcal m}^{-2})\text{yr}^{-1}$.
Given below are two statements:
Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.
Statement II: Ecosystems are exempted from 2nd law of thermodynamics.
In the light of the above statements, choose the most appropriate answer:
Energy flow is unidirectional (I correct). Ecosystems obey the laws of thermodynamics, including the second law, so they are not exempted (II incorrect).
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