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Name_____________________________
Period________
I can explain that cells divide for growth and repair
Mr. Macken Intro Video
1. Give two reasons why our bodies require cell division?___________________ __________________
Notes from Cell Video
1. Cells come in all shapes and ____________________.
2. They perform thousands of different _____________________ in the life forms of Earth.
3. They work together to form the _______________________of all living things.
4. But cells do not ________________ forever.
5. Eventually they __________________
6. Fortunately they have the ability to ___________________ first
7. Through a process called _________ ________________________.
8. It begins with a ___________________ signal to prepare for _________________________.
9. The cell grows larger during the ______ phase.
10. After growth the cell duplicates its _________________.
11. Another name for cell division is ________________________.
Length of the Cell Cycle
How long does it take for a cell to go through one cell cycle? It all depends on the cell. A human liver cell,
for example, completes one cell cycle in about 22 hours, as shown in the graph. Study the graph and then
answer the following questions.
(1) Reading Graphs What do the three curved arrows outside the circle represent?
(2) Reading Graphs In what stage of the cell cycle is the wedge representing growth?
(3) Interpreting Data In human liver cells, how long does it take DNA replication to occur?
(4) Drawing Conclusions In human liver cells, what stage in the cell cycle takes the longest time?
Taken from Prentice Hall Science Explorer