Please enable JavaScript.

Coggle requires JavaScript to display documents.

Biology Revision (Growth (There are three necessities for plant growth…

- - - - As cells differentiate the activiate/express or silence/repress certain genes which lead to different proteins being produced, changing the shape structued or chemistry of a cell
  - - - If head circumference increases too slowly, it suggests a problem called microcephaly
      - If head circumference increases too quickly it suggests a problem called hydrocephalus
    - - If length is not increasing at the right rate, it suggests an underlying health or hormone problem
    - - If mass is put on too quickly, the risk of childhood obesity increases
      - If mass is put on too slowly, there may be trouble with feeding/food intolerance or digestion
- - - - 2) Prophase: The stage of the cell cycle for the Nucleus breaks down and spindle fibres start to appear
        
        3) Metaphase: The stage of the cell cycle when the chromosomes are lined up on the spindle fibres in the middle of the cell
        
        4) Anaphase: The stage of the cell cycle where the separated chromosomes are pulled by spindle fibres to opposite ends of the cell
        
        5) Telophase: The stage of the cell cycle where a membrane forms over each set of chromosomes to form nuclei
        
        6) Cytokinesis: The stage of the cell cycle where a cell surface membrane forms to separate the two cells. In plant cells, a cell wall is formed.
  - - - A benign tumour does not spread from its point of origin; there is no growing and it is harmless. Moles are a good example of this
      - A malignant tumour may invade surrounding tissue. They develop their own blood and lymph vessels which can carry malignant cells to other parts of the body by he bloodstream or lympathic system
      - The difference between a cancer and a tumour is that a cancer is always malignant - it is the spread of cancer cells throughout the body. However tumours may be benign or malignant.