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NTA Abhyas NEET2020BotanyEcosystemPractice

Choose the incorrect statement from the following.

Options

  1. ASun is the only source of energy for every single ecosystem on earth.
  2. BPlants capture 2-10% of PAR.
  3. CEcosystems follow the 2nd law of thermodynamics.
  4. DIn a terrestrial ecosystem major producers are herbaceous and woody plants.

Correct answer

A. Sun is the only source of energy for every single ecosystem on earth.

Step-by-step solution

Sun is not the source of energy in deep sea hydro-thermal ecosystem. Ecosystems need energy continuously to synthesize molecules to counteract the tendency of disorderliness. Thus, they follow the second law of thermodynamics. Plants only use 2%–10% of the photosynthetically active radiation which itself is less than 50% of the total incident solar radiation.

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