Briefly state the major theories of origin of life. Which one of them has scientific basis ?

Solution

The major theories of origin of life are :

1. Special Creation (Proposed by Father Saurez). This theory of special creation attributes the origin of life to a supernatural or vitalistic events at a particular time in the past. In other words, this theory believes in the creation of life by God.

2. Spontaneous Generation : This theory discards the abiogenesis and believes in biogenetic origin of life i.e. life originates from pre-existing life-biogenesis.

3. Extra terrestrial or Cosmic Origin (Richter). This theory believes that life on earth came from some other planet.

4. Terrestrial Origin or Abiogenic Origin (Oparin and Haldane). This theory states that life originates on earth from collections of organic molecules that were produced early in the history of the earth. This theory of terrestrial origin has scientific basis.

Some More Questions From Evolution Chapter

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Evolution

Briefly state the major theories of origin of life. Which one of them has scientific basis ?

Some More Questions From Evolution Chapter

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

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