Specification: 1.1.3 Cell Division, Cell Diversity and Cellular Organisation

- state that mitosis occupies only a small percentage of the cell cycle and that the remaining 
   percentage includes the copying and checking of genetic information;
- describe, with the aid of diagrams and photographs, the main stages of mitosis:
      - behaviour of the chromosomes
      - nuclear envelope
      - cell membrane 
      - centrioles
- explain the meaning of the term homologous pair of chromosomes
- explain the significance of mitosis for growth, repair and asexual reproduction in plants and 
animals
- outline, with the aid of diagrams and photographs, the process of cell division by budding in yeast
- state that cells produced as a result of meiosis are not genetically identical (details of 
   meiosis are not required)
- define the term stem cell
- define the term differentiation, with reference to the production of erythrocytes (red blood 
   cells) and neutrophils derived from stem cells in bone marrow, and the production of xylem 
   vessels and phloem sieve tubes from cambium
- describe and explain, with the aid of diagrams and photographs, how cells of multicellular 
   organisms are specialised for particular functions, with reference to:
      - erythrocytes
      - neutrophils
      - epithelial cells
      - sperm cells
      - palisade cells
      - root hair cells
      - guard cells 
- explain the meaning of the terms tissue, organ and organ system; 
- explain, with the aid of diagrams and photographs, how cells are organised into tissues, 
   using squamous and ciliated epithelia, xylem and phloem as examples; 
- discuss the importance of cooperation between cells, tissues, organs and organ systems