Bio 101 Origin of life

earth is ___ billion years old

• 4.6

• 3.8

• 3.5

• 1.5

• 1.8

the first life forms started to appear ___ billion years ago

• 4.6

• 3.8

• 3.5

• 1.5

• 1.8

stromatolites date back ___ billion years ago

• 4.6

• 3.8

• 3.5

• 1.5

• 1.8

singled celled prokaryotes were earth's sole inhabitants for ___ billion years

• 4.6

• 3.8

• 3.5

• 1.5

• 1.8

the first eukaryotic life forms appeared ___ billion years ago

• 4.6

• 3.8

• 3.5

• 1.5

• 1.8

life created from inorganic compounds

• Abiotic Synthesis

• RNA

• ribozymes (RNA)

• endosymbiont theory

• endosymbiont

the 1st genetic material of early life on earth like was made up of ____

• Abiotic Synthesis

• RNA

• ribozymes (RNA)

• endosymbiont theory

• endosymbiont

first catalysts were ______

• Abiotic Synthesis

• RNA

• ribozymes (RNA)

• endosymbiont theory

• endosymbiont

proposes that the mitochondria & plastids (chloroplasts) were formerly small prokaryotes living within larger hosts

• Abiotic Synthesis

• RNA

• ribozymes (RNA)

• endosymbiont theory

• endosymbiont

a cell that lives within a host cell

• Abiotic Synthesis

• RNA

• ribozymes (RNA)

• endosymbiont theory

• endosymbiont