Endosymbiotic Theory

What is a scientific theory?

• An educated guess

• An explanation of a scientific event supported by scientific evidence

• A hypothesis

• A proven fact

What is the endosymbiotic theory?

• An explanation for how eukaryote cells evolved from prokaryote cells

• An explanation for how prokaryote cells evolved from eukaryote cells

• An explanation for how cells evolved from non-living matter

• An explanation for how cells evolved from viruses

What is the main difference between prokaryote and eukaryote cells?

• Prokaryote cells have a nucleus, while eukaryote cells do not

• Prokaryote cells have no true nuclei, while eukaryote cells do

• Prokaryote cells are more complex than eukaryote cells

• Prokaryote cells can perform photosynthesis, while eukaryote cells cannot

What is believed to be the ancestor heterotroph eukaryote cell?

• A prokaryote cell that could perform photosynthesis

• A prokaryote cell that could use oxygen to produce ATP energy

• A large prokaryote cell that could consume others

• A small bacteria that lived in symbiosis with a prokaryote cell

What is believed to be the ancestor autotroph eukaryote?

• A prokaryote cell that could perform photosynthesis

• A prokaryote cell that could use oxygen to produce ATP energy

• A large prokaryote cell that could consume others

• A small bacteria that lived in symbiosis with a prokaryote cell

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What did the bacteria that used oxygen to produce their own energy evolve into?

• Mitochondria

• Chloroplasts

• Nucleus

• Ribosomes

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What did the bacteria that used sunlight energy to produce their own food evolve into?

• Mitochondria

• Chloroplasts

• Nucleus

• Ribosomes

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What is one of the facts that support the endosymbiotic theory?

• Mitochondria and chloroplasts have their own DNA

• Mitochondria and chloroplasts have the same size as eukaryote cells

• Mitochondria and chloroplasts divide in a way similar to how eukaryote cells divide

• Mitochondria and chloroplasts are found in all prokaryote cells

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What is secondary endosymbiosis?

• The process of eukaryote cells evolving into prokaryote cells

• The process of prokaryote cells evolving into eukaryote cells

• The process of eukaryote cells engulfing other eukaryote cells

• The process of prokaryote cells engulfing other prokaryote cells

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What is an example of endosymbiosis happening today?

• Termites having prokaryotes in their gut to help digest wood

• Plants having mitochondria to produce ATP energy

• Animals having chloroplasts to perform photosynthesis

• Humans having bacteria in their cells to produce oxygen