Question : The green plants in a terrestrial ecosystem capture about ______ per cent of the energy of sunlight that falls on their leaves and convert it into food energy.
Option 1: 20
Option 2: 10
Option 3: 1
Option 4: 5
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Correct Answer: 1
Solution : The correct option is 1.
The green plants in a terrestrial ecosystem capture about 1% of the energy from sunlight that falls on their leaves during photosynthesis. This process converts solar energy into chemical energy stored in the form of carbohydrates, sustaining the plant and serving as the foundation for the food chain.
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Question : What is the primary source of energy in an ecosystem?
Option 1: Moonlight
Option 2: Sunlight
Option 3: Oxidation in plants
Option 4: The heat released during respiration
Question : About how much of the world's land area is tropical rainforest?
Option 1: 2 per cent
Option 2: 7 per cent
Option 3: 10 per cent
Option 4: 15 per cent
Question : In a water-lifting electric pump, we convert
Option 1: electrical energy into potential energy
Option 2: kinetic energy into electrical energy
Option 3: kinetic energy into potential energy
Option 4: electrical energy into kinetic energy
Question : The deciduous trees will :
Option 1: shed their leaves every year
Option 2: not lose their leaves
Option 3: synthesise their own food
Option 4: depend on others for their food
Question : The process of photosynthesis involves conversion of
Option 1: chemical energy into radiant energy
Option 2: chemical energy into mechanical energy
Option 3: solar energy into chemical energy
Option 4: mechanical energy into solar energy
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