First organism which was evolved on the earth

First organisms to evolve on the earth were :

First organisms to evolve on the earth were :

First organism to evolve on the earth were

The organism which appeared first on earth is known as

The first organisms appeared on earth were

The first organisms appeared on earth were

Assertion. All organisms contain the same organic compounds in about the same proportions. Reason. All organisms have evolved from the first primitive cells which came into existence about 3.6 billion years ago.