1.03 Earth's Early Atmosphere

Eukaryote

organism whose cells contain nuclei

Microspheres

tiny bubbles filled with groups of molecules able to maintain an internal environment different from their surroundings

Nucleotides

the building blocks of DNA

organic molecules

carbon-based molecules

Prokaryote

unicellular organism that lacks a nucleus

RNA world hypothesis

a hypothesis that explains that some of the first large organic molecules to form and self-replicate were RNA molecules, with DNA molecules forming much later