Download Cell: The Basic Unit of Life

Name: __________________________________ Date: __________ Period: _____ TOC # _____
Cell: The Basic Unit of Life
1. The first _________________________________ appeared on Earth over 3.5 billion years ago.
2. _________________________ discovered the first cells. He thought they looked like
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3. What is the difference between prokaryotic cells and eukaryotic cells?
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4. Which is the only kingdom of life that is made from prokaryotic cells? _______________
5. What is the structure that directs cellular activities? _____________________________
6. What do eukaryotic cells have that prokaryotic cells don’t have?
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7. What features of ancient aquatic organisms made it possible for them to leave the
sea and colonize the dry land about 400 million years ago? ___________________________
8. Human and many other organisms don’t live in water. Why might a person make the
statement that all life is aquatic? _____________________________________________
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9. Would you say cells, bacteria, algae, plants, or animals are the basic units of life?
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Explain why you think so. ________________________________________________
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10. Look at the diagrams of the plant cell and animal cell on page 29. What structures do
the plant cells have that animal cells don’t have?
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