2.1-2.4 Cell division

2.1 Cell division

• The Cell Cycle
• cell division helps grow and repair tissue
• mitosis cells split
• 

2.2 Growth and Differentiation

• unspecialised cells are stem cells
• adult stem cells replace cells which can't divide
• plant cells divide forever
• animal cells divide once
• genetically identical offspring is cloning
• animal cells can't become unspecialised again

2.3 Stem Cells

• Stem cells are unspecialised cells
• egg and sperm make zygote
• adult stem cells can be any cell

2.4 Stem Cell Dilemmas

• problems with stem cell research
• violation of embryo rights
• not interfere with natural process
• a lot of money