Q4 of 18 Page 178

About how many year before was the photosynthetic life present on the Earth?

It has been known by study of microfossils obtained from rocks during haeden period that photosynthetic life was present on the Earth about 4 million years ago.

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2

Which scientist revived the idea of static universe?

 3

Which is the most accepted hypothesis about the formation of universe?

 5

What do we call the group of organisms capable of maintaining its characteristics from generation to generation?

 6

In which sukta of ‘Rigveda’, the origin of universe has been discussed in detail?