Louis Pasteur used a goose-neck flask and demonstrated what?

Fossil evidence suggests life on Earth arrived

Earth's early atmosphere had no

lightening and solar radiation provided enough energy to transform atmospheric chemicals into biomolecules, which then accumulated in the massive ocean covering the earth’s surface.

Bacteria and amino acids were brought to earh

These scientists proved that organic molecules formed from inorganic molecules present in the Earth’s early atmosphere when given energy from lightening.

The Earth was ‘seeded’ with life by other sources in the universe

A repeating cycle whereby organic molecules could have been brought together by energy from underwater volcanic gas bubbles and released into the atmosphere where UV rays changed them further

The first prokaryotes did not require oxygen and were

This bacteria formed 3.5 bya and was photosynthetic and release oxygen into the atmosphere.

The release of oxygen into the atmosphere was so massive that this happened to the anaerobic bacteria

This theory describes how archaebacteria and eubacteria joined forces to create this larger cell

Mitochondria and chloroplasts are thought to be ________________________ cells engulfed by a larger one.