What is the basic unit of life according to cell theory?

• Tissue

• Organ

• Cell

• Organism

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ONTARIO.SCIENCE.8.B2.1

Which organelle is responsible for controlling the activities of the cell?

• Mitochondria

• Nucleus

• Chloroplast

• Vacuole

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ONTARIO.SCIENCE.8.B2.2

What is one major difference between plant and animal cells?

• Plant cells have a cell wall, animal cells do not.

• Animal cells have chloroplasts, plant cells do not.

• Plant cells have a nucleus, animal cells do not.

• Animal cells have a cell wall, plant cells do not.

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ONTARIO.SCIENCE.8.B2.3

What is the process by which water molecules move across a semi-permeable membrane?

• Diffusion

• Osmosis

• Active transport

• Endocytosis

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ONTARIO.SCIENCE.8.B2.4

Which of the following is a unicellular organism?

• Human

• Oak tree

• Amoeba

• Dog

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ONTARIO.SCIENCE.8.B2.5

According to cell theory, all living things are composed of what?

• Atoms

• Cells

• Molecules

• Tissues

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ONTARIO.SCIENCE.8.B2.1

Which organelle is known as the powerhouse of the cell?

• Nucleus

• Chloroplast

• Mitochondria

• Ribosome

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ONTARIO.SCIENCE.8.B2.2

Which structure is found in plant cells but not in animal cells?

• Cell membrane

• Cytoplasm

• Cell wall

• Nucleus

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ONTARIO.SCIENCE.8.B2.3

What is the term for the movement of particles from an area of high concentration to an area of low concentration?

• Osmosis

• Diffusion

• Active transport

• Phagocytosis

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ONTARIO.SCIENCE.8.B2.4

How do multicellular organisms typically meet their basic needs compared to unicellular organisms?

• Multicellular organisms rely on a single cell to perform all functions.

• Unicellular organisms have specialized cells for different functions.

• Multicellular organisms have specialized cells for different functions.

• Unicellular organisms do not need to meet basic needs.

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ONTARIO.SCIENCE.8.B2.5