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Question
Which one of the following options lists the primary energy source(s) for all forms of life on earth?
Which one of the following options lists the primary energy source(s) for all forms of life on earth?
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Solution
The correct option is D Light and inorganic substances
The light obtained from the sun is the primary source of energy for all forms of life on Earth. Plants and other photosynthetic bacteria convert sunlight into chemical energy in the form of food. All other animals obtain food directly or indirectly from plants. Also, autotrophs obtain energy either from sunlight or from inorganic substances to produce energy-rich molecules such as carbohydrates. Autotrophs are the primary producers in the ecosystem. They are fundamental to the food chains of all ecosystems.Thus, the correct answer is option A.
The light obtained from the sun is the primary source of energy for all forms of life on Earth. Plants and other photosynthetic bacteria convert sunlight into chemical energy in the form of food. All other animals obtain food directly or indirectly from plants. Also, autotrophs obtain energy either from sunlight or from inorganic substances to produce energy-rich molecules such as carbohydrates. Autotrophs are the primary producers in the ecosystem. They are fundamental to the food chains of all ecosystems.
Thus, the correct answer is option A.
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