Read Each Question, and Write Your Answer in the Space Provided

Name______Class______Date______

Skills Worksheet

CH7.1Directed 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

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

Skills Worksheet

CH7.2 Directed Reading

Section: Inside the Eukaryotic Cell

Read each question, and write your answer in the space provided.

1.What is the cytoskeleton, and what is its function?

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2.What are three types of cytoskeleton fibers, and what does each do?

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3.What is the main function of the nucleus, and why is this essential for the health of the cell?

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4.What is the nucleolus, where is it, and what is its function?

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5.What are the two types of ribosomes, and what does each do?

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6.Describe the endoplasmic reticulum, and tell what the two different kinds of endoplasmic reticulum do.

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Directed Reading continued

7.How does the Golgi apparatus continue the function of the rough ER?

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8.What are two functions of lysosomes?

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9.What do contractile vacuoles in plants do?

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10.What do contractile vacuoles in protists do?

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11.What is ATP?

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12.What are chloroplasts, how are they structured, and in what kinds of cells are they found?

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13.What function do mitochondria perform? Why do some cells contain many mitochondria?

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Skills Worksheet

CH7.3Directed Reading

Section: From Cell to Organism

Read each question, and write your answer in the space provided.

1.What are four ways that prokaryotes differ from eukaryotes?

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2.What are some ways that prokaryotes can vary?

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3.What are two different structures some prokaryotes have? Describe each, and tell its function.

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4.How do plant cells differ from animal cells?

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5.Define tissue, and give an example of a plant tissue and an animal tissue.

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Directed Reading continued

6.Define organ, and give an example of an organ in plants and an organ in animals.

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7.Distinguish between organs and organ systems. Give an example of an organ system in plants and an organ system in animals.

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8.Define multicellular organism.

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9.What is a colonial organism? Give an example.

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10.What makes multicellular organisms very different from colonial organisms?

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