Endosymbiotic Theory

What is the definition of a scientific theory?

• An educated guess.

• An explanation of a scientific event supported by scientific evidence.

• A hypothesis that has been proven true.

• A belief that cannot be tested.

What does the Endosymbiotic Theory explain?

• How prokaryotic cells evolved into simpler forms.

• How eukaryotic cells developed the ability to move.

• How eukaryotic cells could have evolved from prokaryotic cells.

• How cells developed the ability to reproduce sexually.

Which of the following is a key difference between prokaryotes and eukaryotes?

• Prokaryotes have a nucleus, while eukaryotes do not.

• Eukaryotes have membrane-bound organelles, while prokaryotes do not.

• Both prokaryotes and eukaryotes have a nucleus.

• Neither prokaryotes nor eukaryotes have ribosomes.

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Which of the following provides evidence for the Endosymbiotic Theory?

• Mitochondria and chloroplasts have their own unique DNA.

• The size of mitochondria and chloroplasts is similar to that of bacteria.

• Mitochondria and chloroplasts divide in a way similar to bacteria.

• All of the above.