The most abundant organic compound on Earth is cellulose, which is made up of many, many glucose molecules all linked together. Cellulose is found in the cell walls of every plant, which is why it is the most abundant organic molecule.

The most abundant organic molecule present on earth is cellulose.

What is Cellulose?

Cellulose is a complex carbohydrate that is found in the cell walls of plants. It is composed of repeating units of glucose molecules that are linked together to form long chains. These chains are then arranged in a way that gives cellulose its characteristic strength and rigidity.

Why is Cellulose Abundant on Earth?

Cellulose is abundant on earth for several reasons:

1. It is found in the cell walls of plants - Plants are the most abundant form of life on earth, and cellulose is a major component of their cell walls. This means that there is a huge amount of cellulose present on earth.

2. It is resistant to degradation - Unlike other organic molecules, cellulose is highly resistant to degradation by enzymes and other biological processes. This means that it can persist in the environment for a long time, contributing to its abundance.

3. It is a major component of biomass - Cellulose is a major component of the biomass of plants. When plants die and decompose, the cellulose in their cell walls is broken down into smaller molecules that can be used by other organisms. This means that there is a constant supply of cellulose being produced and broken down on earth.

Conclusion:

In conclusion, cellulose is the most abundant organic molecule present on earth due to its presence in the cell walls of plants, its resistance to degradation, and its role as a major component of biomass.

It's cellulose. Bcoz cellulose forms the cell walls of plants. Cellulose is the primary constituent of woods. They provide strength and rigidity and it is also difficult to digest cellulose. So the Crt opt is D.