Un escaneo del genoma de Sam para las 100 mutaciones más comunes conocidas por causar RP

Number and variety of living organism; includes genetic, species, and ecological types

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

The (blank) states that all loving things are made of cells.