Discuss why prokaryotic cells probably appeared before eukaryotic cells Hypothesize whether prokaryotic cells might have been symbiotic before the evolution of the eukaryotic cells 

Infer why scientists hypothesize that chemical events preceded the origin of life on Earth?Compare and contrast spontaneous generation and biogenesis   

 
Discuss why prokaryotic cells probably appeared before eukaryotic cells Hypothesize whether prokaryotic cells might have been symbiotic before the evolution of the eukaryotic cells 

 
Describe the hypothesized sequence of chemical and biological events that preceded the origin of eukaryotic cells