Most of the species that have ever lived are still in existence.

a. True

b. False

False

Explanation:

Most of the species that become extinct are never scientifically recorded. About 99 percent of the species estimated to have died out that ever lived on the Earth. The extinction is that moment before which the ability to recover and breed may have lost. The death of last individual of the species is called extinction. Species become extinct when the cannot survive in the changing environmental conditions or against the superior competition.