Question

The energy which is utilized by the living world is primarily
(A) Heat energy
(B) Electrical energy
(C) Light energy
(D) Kinetic energy

Answer 1

In plants, the chloroplasts obtain energy from the sun and use carbon dioxide and water in the process called photosynthesis to produce sugars. Animals can make use of the sugars given by the plants in their cellular energy factories, the mitochondria. The functional work is energy
transformations of plants and animals.

Step by step answer: Option A- Heat energy
Heat energy is transmitted by a variation in temperature. Heat energy is the energy conserved
within atoms that can be produced when the organism vibrates and causes friction. The percentage
of heat energy in a given entity is estimated by the amount of equivalent energy that would be
required to heat the material by one degree Celsius.
Option B- Electrical energy
Electrical energy is a form of energy arising from the flow of electric charge. Electric energy is the
ability to do work or apply force to move an object. The electrical energy is produced by the force is
electrical attraction or repulsion between charged particles.
Option C- Light energy
Plants convert light energy from the sun into chemical energy and food is prepared by the process of
photosynthesis. Animals eat plant products and use that same chemical energy for all their activities.
Option D- Kinetic energy
The kinetic energy is sunlight, which is modified to potential energy by the creation of glucose. After
an animal eats the plant is the potential energy from the sunlight released as kinetic energy used for
movement and growth.
Hence option C is correct.

Note: All living organisms require the energy to grow and reproduce, strengthen their structures, and respond to their environments. Energy is vital for animal survival because it helps them to work and to grow.