Crashcourse: Intro to Cells

What did people in Aristotle's time believe about the origin of life?

• Life came from non-living things.

• Life was created by magic.

• Life came from the sea.

• Life was brought by aliens.

Who discovered cells by looking at cork under a microscope?

• Isaac Newton

• Robert Hooke

• Aristotle

• Dr. Sammy

What is a key difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells are larger.

• Eukaryotic cells have a nucleus.

• Eukaryotic cells are smaller.

• Prokaryotic cells have a nucleus.

What is the function of the cell membrane in a eukaryotic cell?

• It produces energy.

• It stores water.

• It creates proteins.

• It acts as a barrier.

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Which organelle is known as the power plant of the cell?

• Mitochondria

• Golgi apparatus

• Chloroplast

• Nucleus

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What unique feature do plant cells have that animal cells do not?

• Nucleus

• Mitochondria

• Chloroplasts

• Ribosomes

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What is endosymbiosis?

• A theory about plant growth.

• A relationship where one organism lives inside another.

• A process of cell division.

• A type of cell wall.

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Who helped popularize the idea of endosymbiosis in the 1960s?

• Robert Hooke

• Dr. Lynn Margulis

• Isaac Newton

• Dr. Sammy

What does modern cell theory add to classical cell theory?

• Energy flows within cells.

• Cells are made of water.

• Cells are invisible.

• Cells are made of air.

Why are most cells very small?

• To fit inside the body.

• To have a large surface-to-volume ratio.

• To be invisible.

• To float in the air.