Indiana Science Grade 7Unit 1:
The Basis of LifeCells in Petri dishProject Type: Technology
Imagine that a cell is placed in a dish of nutrientrich agar. Twenty minutes later, the cell would have divided to form two cells. Assuming that the cells continue to divide every 20 minutes, how many cells would be in the dish an hour after the first division? Two hours after the first division? Using a computer graphing program, illustrate the pattern of cell reproduction with the correct number of cells at 20minute intervals. Students can also create their graphs using pen and paper if a computer is not available. They should clearly label each 20minute interval. Results:
Students' graphs should indicate that there would be 16 cells after the first hour and 128 cells after the second hour.
Resources:
Students can visit these sites to learn more about cell division. The Cell Cycle and Mitosis Tutorial http://www.biology.arizona.edu/cell_bio/tutorials/cell_cycle/main.html Cells Alive! http://www.cellsalive.com/ Rubric: Click her for a rubric to help you score this project.
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