Chapter 25 Concept Map 2

Pre-biotic Evolution

Oparin & Haldane

4 Stages:

Miller & Urey

RNA World Hypothesis

Abiotic synthesis of small organic molecules

Joining into macromolecules

Packaging of macromolecules into protocells

Origin of self-replicating molecules

Earth's environment is a by-product of life

Theory of a low oxygen Earth

Current atmosphere is caused by the formation and evolution of life

In other words:

Believed:

Based on:

Tested composition of old rocks and what they found led them to believe that Earth’s atmosphere originally had a very low oxygen content

Goldilocks Planet

A large number of conditions have to be just right for life to emerge

simulated early Earth's conditions

Assuming:

Tested:

Produced simple but important molecules

Which:

Created an experiment that:

RNA was first genetic molecule & a catalyst for reactions

Ribozymes

States that:

Based on discovery of:

Catalyze reactions

Which: