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Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Directed Reading
Section: Introduction to Cells
Read each question, and write your answer in the space provided.
1. How and when did scientists discover cells?
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2. What is the cell theory? Who formulated it and when?
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3. How do cells vary in shape?
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4. Why is it an advantage for cells to be small?
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In the space provided, write the letter of the description that best matches
each term.
_____ 5. cell membrane
_____ 6. cytoplasm
_____ 7. DNA
_____ 8. ribosome
_____ 9. organelles
_____ 10. nucleus
a. cell fluid and structures
b. cell structure where proteins are made
c. cell structures that carry out specific
functions
d. genetic information
e. membrane-bound structure that houses a
cell’s DNA
f. the outer boundary of a cell
Name ______________________________ Class ___________________ Date __________________
Directed Reading continued
Read each question, and write your answer in the space provided.
11. What are prokaryotes, what are they like, and when did they arise?
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12. How do eukaryotes differ from prokaryotes? When did eukaryotes arise?
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Write p if the cell feature is found in prokaryotes. Write e if the cell feature is
found in eukaryotes. Write b if the cell feature is found in both prokaryotes
and eukaryotes.
_____ 13. cell membrane
_____ 14. cytoplasm
_____ 15. capsule
_____ 16. DNA
_____ 17. ribosomes
_____ 18. organelles
_____ 19. nucleus
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