The first organisms were 

1. chemoautotrophs

2. chemoheterotrophs

3. autotrophs

4. eukaryotes

Which of these are considered most essential in the origin of life?

1. Enzymes

2. Nucleic acids

3. Carbohydrates

4. Proteins

Basis of life are 

The mechanism of non cellular aggregates of giant macromolecules to cell with membranous envelop is