“Cellular & Sexual Reproduction
[Pages:26]"Cellular & Sexual Reproduction"
Class R1
Warm-up
Complete the cryptogram on Cell Reproduction Review
CELLS ARE PRODUCED BY MITOSIS OR MEIOSIS
Cellular Growth Objectives ? Explain why cells are relatively small.
? Summarize the primary stages of the cell cycle.
? Describe the stages of interphase.
Cellular Growth
? When the cell reaches its size limitation: ?It will stop growing ?It will divide
Tik Tok Mitosis Mitosis Rap
Cell Size Limitations
? Most cells are less than 100um (100 x 10-6m)in diameter.
Ratio of surface area to volume ? Key factor that limits cell size ? Surface area ? area covered by the plasma
membrane ? Equation: length x width x # of sides ? Volume ? space taken up by the inner contents of the cell (organelles, cytoplasm, & nucleus) ? Equation: length x width x height
Cell Size Limitations
If a cell has a high surface area to volume ratio, then it can more effectively:
? Transport food & oxygen in the cell ? Transport waste & carbon dioxide out of the cell ? Communicate within the cell
Why are cells small?
Why are cells small?
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