First Life

Some cells engulfed each other leading to the formation of more complex cells that we now call _______

Eukaryotes

Earth's atmosphere had to be very hot and little oxygen for the first ____ molecules to first form

Organic

When cells gained the ability to do ______, they used up carbon dioxide and put more _____ into the atmosphere

Photosynthesis, Oxygen

_____ cells were the first to evolve

Prokaryotic

Organic molecules clumped together for form _______ structures that later evolved into cells

Self- replicating

With more oxygen in the atmosphere, a wider ____ organisms evolved on land.

Variety