Exploring Life

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.

The smallest unit of life is the _____

• cell

• homeostasis

• organism

• protein

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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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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.

Students carried out an investigation in which they examined pond water under a light microscope. When they look at some green objects found in the pond water, they see detailed structures like the diagram.

Did this investigation produce evidence that this object is a living thing?

•  No; living things are large enough to be seen without a microscope.

• No; there is no mouth or digestive system.

•  Yes; it is composed of cells.

• Yes; it contains organized body systems.

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Animals are multicellular.

• True

• False

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________cells have genetic material that is not surrounded by a lining.

• Prokaryotic

• Eukaryotic

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

• True

• False

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Cells are sometimes called the ________

• building blocks of lego

• building blocks of life

• blocks of the building

• building of the building

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Which of the following is a multicellular organism?

• bacterium

• amoeba

• mouse

• paramecium

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