Cell Evolution

How do cells support evolution?

• All living things are made of cells suggesting a common ancestor

• Cells are really tiny

• Not all living things are made of cells

• Evolution is a theory

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What is the endosymbiotic theory?

• A theory that explains the origin of eukaryotic cells from prokaryotic organisms

• A theory that describes how cells divide

• A theory about the chemical composition of cells

• A theory that explains the structure of DNA

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Which organelle is believed to have originated from an ancient symbiotic relationship between a primitive eukaryotic cell and a prokaryotic cell?

• Mitochondria

• Nucleus

• Ribosome

• Endoplasmic reticulum

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What evidence supports the endosymbiotic theory?

• Mitochondria and chloroplasts have their own DNA

• Cells have a nucleus

• Cells can reproduce independently

• Cells have a cell membrane

Which of the following is a characteristic of prokaryotic cells?

• Lack of a nucleus

• Presence of mitochondria

• Presence of chloroplasts

• Complex internal structure

How do mitochondria and chloroplasts support the theory of endosymbiosis?

• They have their own DNA and ribosomes similar to bacteria

• They are found in all living organisms

• They are responsible for cell division

• They are involved in protein synthesis

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What is a key difference between prokaryotic and eukaryotic cells?

• Eukaryotic cells have a nucleus, prokaryotic cells do not

• Prokaryotic cells have a nucleus, eukaryotic cells do not

• Both have a nucleus

• Neither have a nucleus

Which process is essential for the evolution of multicellular organisms?

• Cell differentiation

• Photosynthesis

• Fermentation

• Glycolysis

What role do mutations play in cell evolution?

• They introduce genetic variation

• They prevent cell division

• They stabilize the genetic code

• They eliminate genetic diversity

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Which of the following best describes the concept of 'survival of the fittest' in cell evolution?

• Cells that are best adapted to their environment survive and reproduce

• All cells survive regardless of their environment

• Cells that are weakest survive

• Cells do not change over time

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