TEACHER NOTES AND ANSWERS Section 5.1

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TEACHER NOTES AND ANSWERS
Section 5.1
1. gap 1
2. cell growth, normal functions, replications of organelles
3. synthesis
4. copies DNA
5. gap 2
6. additional growth and carrying out of normal functions
7. mitosis
8. cell division
9. prophase
10. metaphase
11. anaphase
12. telophase
13. cytokinesis
14. mitosis
15. interphase
Cells divide at different rates
Rates of cell division vary widely and are linked to the body’s need. The length of gap 1
varies most widely among cell types. Some cells, such as neurons, enter a stage called
G0, where cells are unlikely to divide again.
Cell size is limited
If cells were too small, they could not contain all the organelles and molecules necessary for
life. If cells were too large, they could not move enough materials across the membrane
surface. To maintain a suitable size, cell growth and division must be coordinated.
The smallest cube should be circled.
© Houghton Mifflin Harcourt Publishing Company
Holt McDougal Biology
Cell Growth and Division
Name: _____________________________ Class: __________________ Date: __________________
Section 1: The Cell Cycle
PowerNotes
© Houghton Mifflin Harcourt Publishing Company
Holt McDougal Biology
Cell Growth and Division
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