During the long period (gt 3 billion years) since the origin and diversification of life on earth there are how many episodes of mass extinction of species

Which among the following statement/s is/are INCORRECT? I. Since the origin and form diversification of earth there were four episodes of extinction. II. The current rate of extinction is 100 to 1000 times faster than in the pre-human times. III. Ecologists warn that if the present trend continues, nearly one-fourth of all the species on earth might be wiped out within the next 100 years.

Which among the following statement/s is/are INCORRECT? I. Since the origin and form diversification of earth there were four episodes of extinction. II. The current rate of extinction is 100 to 1000 times faster than in the pre-human times. III. Ecologists warn that if the present trend continues, nearly one-fourth of all the species on earth might be wiped out within the next 100 years.

How many species are extincting every year ?

How many years ago life originated on earth?

How many species became extinct in the last 500 years

How many species became extinct in the last 500 years

Earth has originated about how many years ago ?

Since the origin of life on Earth, there were five episodes of mass extinction of species . (i) How is the 'Sixth Extinction', presently in progress, different from the previous episodes ? (ii) Who is mainly responsible for the 'Sixth Extinction' ? (iii) List any four points that can help to overcome this disaster.