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Ultimate sources of energy for all living organism is
  • a)
    Planets
  • b)
    Moon
  • c)
    Sun
  • d)
    Coal
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Ultimate sources of energy for all living organism isa)Planetsb)Moonc)...
"Sun is the ultimate energy source for all living organisms."

- This is because plants need sunlight to make food through photosynthesis. This food is consumed by the animals and human-beings. Carnivores indirectly depend on plants for their food. So, if Sun is not there there will be no life on earth.

- Secondly, sunlight is a good source of Vitamin-D.
Vitamin D is essential for strong bones, because it helps the body use calcium from the diet. Traditionally, vitamin D deficiency has been associated with rickets, a disease in which the bone tissue doesn't properly mineralize, leading to soft bones and skeletal deformities. So if sunlight is not there it can result in loss of Vitamin-D which can cause deficiency diseases.

- If sunlight is not there there will be no day on Earth. Light will not reach our Earth. Every time there will be only darkness.
This question is part of UPSC exam. View all Class 7 courses
Most Upvoted Answer
Ultimate sources of energy for all living organism isa)Planetsb)Moonc)...
Life on earth is sustained just due to the presence of sun, our star. It is the ultimate source of energy for earth as photosynthesis does not takes place without sunlight, and without it we will not be here. So, for us, sun is very essential.. (just until it is not a red giant!!)
Community Answer
Ultimate sources of energy for all living organism isa)Planetsb)Moonc)...
Sun is ultimate source of energy
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Ultimate sources of energy for all living organism isa)Planetsb)Moonc)Sund)CoalCorrect answer is option 'C'. Can you explain this answer?
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