The smallest unit of life is the _____.

• cell

• homeostasis

• organism

• protein

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NGSS.MS-LS1-1

Which of the following is NOT a necessary characteristic of a living thing?

• It is made up of cells

• It eats food to get energy

• It grows and develops

• It responds to stimuli

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NGSS.MS-LS1-1

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Which of the following is a multicellular organism?

• bacterium

• amoeba

• mouse

• paramecium

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NGSS.MS-LS1-1

Which statement is true?

• Cells come in different shapes, but are all about the same size—very, very small

• Cells come in different shapes and sizes.

• Cells all have the same shape, but come in different sizes.

• Cells are all the same shape and size—small and rounded.

Animals are multicellular

• true

• false

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NGSS.MS-LS1-1

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___________ cells have genetic material that is not surrounded by a lining.

• Eukaryotic

• Prokaryotic

The cell theory is the result of the hypothesis and observation of one person.

• true

• false

The cell theory states that all cells come from cells that already exist.

• true

• false

Which correctly describes a difference between prokaryotic and eukaryotic cells?

• Only prokaryotic cells have vacuoles

• Eukaryotic cells are smaller than prokaryotic cells

• Prokaryotic cells have many organelles, each with their own specialized functions.

• Only eukaryotic cells have their genetic material surrounded by a lining.

Jade places a fresh, thin slice of onion on a microscope slide to look for evidence that an onion is made of cells.

Describe two observations Jade could make to provide evidence that an onion is made of cells.

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NGSS.MS-LS1-1