B2 - Cell Division

Question 1

B2 - describe the process of mitosis

Answer 1

1.Chromosomes (DNA) are replicated.

2.The two sets of chromosomes align in the middle of the cell.

3.The chromosomes are pulled apart.

4.Membrane divides.

5.Two genetically identical daughter cells are produced

Question 2

B2 - What are the three sources of stem cells?

Answer 2

• Embryonic stem cells (from embryos). These can grow into most types of cells.
• Adult stem cells (from bone marrow). These can grow and replace similar damaged cells.
• Plant stem cells (from meristem tissue). These can grow into any tissue through the life of a plant.