7.1a Cells

What are the 3 parts to the cell theory?

• All organisms are composed of one or more cells.

• The cell is the basic unit of structure.

• All cells come from preexisting cells.

• There are only plant and animal cells.

Improvements in the __________________________ was essential for the development of cell theory

• Spectials

• Camera

• Telescope

• Microscope

While looking at a piece of cork, Robert Hooke saw different boxes that looked like compartments. He decided to call these compartments ______________.

• Cells

• Boxes

• Organisms

• Components

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Aiden is observing cells under a microscope in his biology class. He wonders how new cells are formed. According to cell theory, where do cells come from?

• Preexisting cells

• A multicellular organism

• Energy from the sun

• The nonliving environment

A plant and an animal are both living things. According to the Cell Theory, what can you conclude about these two very different organisms?

• Plants have cells but animals do not.
• They are both made of one or more cells. 
• They both come from the same kind of cell.
• They both come from a non-living organism.

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Rocks are not living because

• they never move
• they aren't needed for humans
• they are not made of cells
• they don't break down

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Match the following parts of the Cell Theory

• pre-existing (other) cells

• All organisms are made of

• basic unit

• All cells come from...

• cells

• Cells are the ______ of life

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Which of the following best describes the relationship between cells and living things in general?

• The larger the living thing, the larger the cells.

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

• The number of cells in all living things is the same.

• There is one kind of cell, which all living things are made of.

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Luna is observing pond water under a microscope and notices a one-celled organism called an paramecium. Based on cell theory, which of the following characteristics of paramecia must be true?

• All paramecia have an oval shape.

• All paramecia move using cillia

• All paramecia have organelles called chloroplasts.

• All paramecia come from other paramecia.

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While studying samples from a remote rainforest, scientists discover a new species of living thing. According to cell theory, which of the following must be true about this new living thing?

• It is composed of one or more cells.

• It must be able to move independently.

• It must have chloroplasts in its cells.

• It must be multicellular.

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