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Evolution

Question

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Following are the two statements regarding the origin of life

I. The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
II. The first autotrophic organisms were the chemoautotrophs that never released oxygen.

Of the above statement which one of the following options is correct?

II is correct but I is false

Both I and II are correct

Both I and II are false

I is correct but II is false

Solution

B.

Both I and II are correct

The first organisms were chemoautotrophic anaerobes.

Some More Questions From Evolution Chapter

What were the units of life according to the early Greek thinkers ?

Mention the type of nutrition in the cells originated first during the origin of life.

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?

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