Question

A biosphere is composed of:
(A) Living organisms
(B) Living organisms + lithosphere
(C) Living organisms + lithosphere + atmosphere
(D) Living organisms + lithosphere + atmosphere + hydrosphere

Answer 1

Hint: A biosphere is a global ecological system which includes all the living beans and their relationships. Plants, animals, and even the microscopic organisms all are part of the biosphere.

Complete step by step solution:
Let’s understand each term mentioned above in detail:
Living organisms- An organism or a living organism is a living thing that has an organized structure it can react to the stimuli, it can reproduce, grow, adapt and most important it interacts with the environment as well as with other organisms. Examples of living organisms are – birds, animals, trees etc.
Lithosphere- it is the rigid, outer layer of the earth. It consists of the crust and the layer of the upper mantle. The lithosphere is extended to a depth of about 100km.
Atmosphere- it is the layer of gases surrounding our planet. Nitrogen and oxygen are the most abundant gases and account for 99 percent of the gases in dry air with some other gases such as argon, carbon dioxide etc.
Hydrosphere- it is defined as the total amount of water on a planet. It includes the water which is on the surface of the planet, underground and in the air.
Biosphere is a global ecological system consisting of all the living organisms, lithosphere, atmosphere and hydrosphere.

Hence the correct answer is option (D)

Note: There are many elements which are important for the existence of the biosphere, it includes the distance of earth to the sun. It also includes the tilt of earth and the seasons. Factors having a smaller effect on the biosphere includes erosion, climate change etc.