Endosymbiotic Theory

What is endosymbiosis?

• The process of cells living together

• The process of cells dividing

• The process of cells absorbing sunlight

• The process of cells releasing energy

Approximately how long ago did the only living organisms on Earth consist of prokaryotes?

• 1 billion years ago

• 2 billion years ago

• 3 billion years ago

• 4 billion years ago

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What were the three main organisms mentioned?

• Blob cells, photosynthetic bacteria, and oxygen gas

• Blob cells, mitochondria, and chloroplasts

• Blob cells, prokaryotes, and eukaryotic cells

• Blob cells, sugar molecules, and complex cells

What is the current best explanation of how complex cells evolved?

• The endosymbiotic theory

• The photosynthesis theory

• The prokaryotic theory

• The eukaryotic theory

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How do chloroplasts and mitochondria multiply?

• By absorbing sunlight

• By converting solar energy into sugar

• By dividing like ancient bacteria

• By breaking down materials like sugar

What do chloroplasts and mitochondria contain?

• Their own DNA and ribosomes

• Their own nucleus and cytoplasm

• Their own chlorophyll and enzymes

• Their own mitochondria and chloroplasts

What is significant about the membranes of chloroplasts and mitochondria?

• They have two inner membranes

• They have two outer membranes

• They have different lipids and proteins

• They have circular DNA structures

What is the name of the eukaryotic organism that absorbed green algae?

• Euglena

• Prokaryote

• Chloroplast

• Mitochondria

What did the absorbing process of endosymbiotic theory allow organisms to do?

• Combine powerful abilities

• Divide into separate organisms

• Absorb sunlight and release energy

• Multiply their DNA and ribosomes

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What did the endosymbiotic theory lead to?

• Microorganisms, plants, and animals

• Prokaryotes and eukaryotic cells

• Photosynthesis and sugar molecules

• Complex cells and oxygen gas

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