Chapter 10: Cell Growth and Division

Section 10.1 (Pg. 274-278): Cell Growth, Division, and Reproduction

Limits to Cell Size

- Bigger cells have more needs- DNA doesn’t grow with the cell

- DNA must work harder to meet the cell’s needs

- This is known as an ‘information crisis’

- Similar to one library in a big city

Limits to Cell Size

- Exchange of material- Bigger cells have hard time getting

nutrients and removing waste

- Smaller cells can interact better with their environment

- Similar to a small highway in a big city

Cell Division- Cells divide and produces two ‘daughter cells’

- Why divide?- Solves problems related to cell size- Growth and development- Repair and maintenance- Reproduction

Cell Division and Reproduction- Cell division can be a form of

reproduction

- Asexual Reproduction- Is the production of genetically

identical offspring from a single parent

Cell Division and Reproduction- Sexual reproduction

- Is when offspring inherit some of their genetic information from each parent

- Offspring are produced by the fusion of special reproductive cells produced by each of two parents

Comparing Asexual and Sexual ReproductionAsexual Reproduction- Quick (can take 20 minutes)- All offspring can be identical- Requires one individual

Sexual Reproduction- Slow (can take years)- All offspring are genetically unique- Requires a mate