Exploring Cells: Single vs. Multi-Celled

What is a key difference between single-celled and multi-celled organisms?

• Single-celled organisms can perform more complex functions than multi-celled organisms.

• Multi-celled organisms have specialized cells for different functions.

• Single-celled organisms have specialized cells for different functions.

• Multi-celled organisms are always smaller than single-celled organisms.

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Which of the following is an example of a single-celled organism?

• Human

• Dog

• Bacterium

• Tree

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What is the primary function of red blood cells in humans?

• To fight infections

• To carry oxygen

• To digest food

• To transmit nerve signals

Which of the following is true about multi-celled organisms?

• All cells perform the same function.

• They do not have specialized cells.

• They have cells that perform different functions.

• They are always single-celled.

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What is the role of nerve cells in the human body?

• To transport nutrients

• To transmit signals

• To produce energy

• To store fat

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Which of the following is NOT a characteristic of single-celled organisms?

• They can reproduce on their own.

• They have specialized cells for different tasks.

• They can perform all necessary life functions.

• They are usually microscopic.

What is the main advantage of having specialized cells in multi-celled organisms?

• It allows the organism to be smaller.

• It enables the organism to perform complex functions efficiently.

• It makes the organism more vulnerable to diseases.

• It reduces the need for energy.

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NGSS.MS-LS1-3

Which type of cell is responsible for fighting infections in the human body?

• Red blood cells

• White blood cells

• Muscle cells

• Skin cells

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How do single-celled organisms typically reproduce?

• By laying eggs

• By binary fission

• By budding

• By mitosis

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Which of the following best describes the function of muscle cells in humans?

• To carry oxygen

• To transmit signals

• To enable movement

• To store nutrients