Cells

What is the main idea of the passage?

• Cells are the building blocks of life

• All living things are made up of tissues

• Cells are only found in plants

• Cells are not important for living organisms

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Main ideas and supporting details

What have scientists discovered about cells?

• They all look alike and perform the same functions

• They do not all look alike and specialize in performing certain functions

• They are all identical in structure and function

• They are all different in structure but perform the same functions

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Main ideas and supporting details

"Many cells apparently specialize in performing a certain kind of function."

What does the word specialize mean in the context of cells?

• Designed for a specific purpose or function

• Capable of adapting to different functions

• Unable to perform any function

• Not important for the overall function of the organism

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Understanding word meanings

The author mentions that Robert Hooke wouldn't believe his eyes if he saw a modern microscope. What is the effect of using this phrase?

• It helps us understand how advanced microscopes are.

• It shows how excited the author is about science.

• It makes Robert Hooke seem grumpy and old-fashioned.

• It shows why Robert Hooke began using microscopes.

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Why do you think scientists study cells?

• To build bigger and better microscopes for science.

• To understand how living things work and stay healthy.

• To invent new types of robots for the future.

• To remember where things are in the human body.