Question

Why is it proper to say that almost all living things are dependent on solar energy.

Answer 1

The energy obtained from the sun is known as solar energy. It is a renewable source of energy which is inexhaustible. It is used as a form of heat and light energy. The photoautotrophs have the capacity to convert the solar energy into chemical energy.

Complete answer:
The sun is considered as an ultimate source of energy which is required by all living organisms.
The sun emits energy in the form of heat and light which is utilised by all living beings. The energy from the sun called the solar energy is absorbed by the chloroplasts present in the plants. This energy is further converted into chemical energy by the process of photosynthesis. The plants prepare their food through photosynthesis.

The food prepared is in the form of carbohydrate which is utilised for carrying out the growth and development of the organism. The animals cannot prepare their own food. They depend on the plants and other plants eating animals for food. So, the animals are indirectly dependent on solar energy and obtain its form of energy from it.

The heat and light energy obtained from the sun provides optimum conditions for living organisms to thrive and carry out their metabolic activities. The sun is the only source of vitamin D which is essential for strong bones and also for carrying out several metabolic activities.

Note: The water is another important element on earth which is essential for supporting life. The water is present in the liquid state on earth due to the heat generated by the sun. The energy obtained from the sun can be harnessed and utilised in several other forms.