Who gave the widely accepted theory on origin of life?

Russian biochemist A.I. Oparin and an English biologist J.B.S. Haldane gave the widely accepted theory on origin of life.

[Theory of Biochemical origin of Life or Modern Theory on Origin of Life or Oparine-Haldane theory all are same]

Describe in brief the evolution of life in the Mesozoic and Cenozoic eras.

Mesozoic era:
The time duration of this era was between (250-65) million years ago. A large number of reptiles were evolved on the land and sea. So, this era was also known as the golden era of reptiles. In the era, the climate condition was suitable for sustaining aquatic, terrestrial & aerial animals like dinosaurs, tortoises, toothed birds, etc.
Cenozoic era:
The time duration of this era is between (65-now) million years ago to now. In this...

How does the theory of evolution explain the diversity of life on Earth? The theory of evolution provides a comprehensive explanation for the diversity of life on Earth. According to the theory, ...

What is mineral oil? Write any three importance of mineral oil.

The oil that are formed in nature by the decomposition of parts of plants and animals that are burried under the earth's surface for a long period of time is called mineral oil.
Any three importance of mineral oil are:
        - It is used as fuel in vehicles, industries, etc.
        - It is used for generating electricity, cooking, food, etc.
...

What are fossils? How are they formed? Describe in brief.

The dead bodies remains of animals and plants which are buried in the earth curst over long period of time are called fossils.
Due to natural disasters like volcano, earthquake, foods, etc. the plants & animals may sink into the earth's ground. The delicate parts of organisms decay in the soil while hard part remains pressed down in the ground. The external morphology of those hard parts is formed in the soil, sand, etc. in the form of all impression. In this way, fossils...

Write short note on fossilization.

The process by which fossils are formed is called fossilization. As we know that due to different natural disasters, the plants and animals may sink into the earth's ground. After that fossils are formed by the impression of preserved parts and skeleton after they are preserved by rocks. As a whole, this process is called fossilization.