The diversity we see today is the result of 3.5 billion years of organic evolution. (True/False)

Which one is present today but was absent about 3 to 5 billion years ago?

3.5 billion years ago, which flora dominated the earth ?

Mass number of chlorine is 35.5 True/False.

Resultant of action and reaction is zero. (True or False)

Our best estimate for the age of Earth, 4.5 billion years, is supported by :

Which one of the following is not true of organisms included in the kingdom Monera ? (a) They reproduce by mitosis (b) They originated at least 3.5 billion years ago (c) They have prokaryotic cellular organisation (d) Most have cell wall

State whether True or False:- Water is an organic solvent.

Which one of the following is present today but was absent about 3.5 billion years ago ?