Cell Theory

An amoeba is a one-celled organism. The cell theory states that which of the following characteristics of amoebas must be true?

• All amoebas have a regular, spherical shape.

• All amoebas come from other amoebas.

• All amoebas move rapidly using a cilia.

• All amoebas have organelles called chloroplasts.

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A student is learning about the cell theory in science class, and she applies it to a fern that she is growing in her bedroom. The cell theory states that which of the following characteristics of the fern must be true?

• The fern’s cells came into existence spontaneously.

• The fern is made up of a collection of cells.

• The cells that make up the fern are nonliving.

• The fern is made up of compounds that are not cells.

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A scientist has discovered an unidentified organism. The cell theory states that which of the following must be true about this new living thing?

• All its cells have different functions.

• It is not made up of cells.

• All its cells are considered nonliving.

• Its cells come from preexisting cells.

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Which of the following is NOT true regarding the theory of cells?

• As the cell grows, so does the size of the organism.

• All living things are made up of one or more cells.

• Cells grow and respond to changes in their environment

• All cells are considered to be living.

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Select the organisms with cells below. (there are multiple answers.

• flower petals

• bacteria

• rocks

• bones

• dead fish

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What is a cell?

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