Biodiversity

• How can you improve conclusion questions?

  -State the trend

  -Bring in specific data points e.g mitotic index was highest at 0.1mm showing that most cell division occurs near the tip

  -Biological reasoning e.g meristematic tissue is found there so more cells will divide more actively/further away you go, cells begin to elongate so fewer cells undergo mitosis
• Give two structural features of an aorta wall explain how they are related to the function of an aorta:

  -thick muscular walls to withstand high blood pressure

  -collagen outer layer to withstand high blood pressure and prevent from splitting

  -smooth endothelium layer to reduce frictional resistance between the blood and the aorta wall
• Describe the appearance and behaviour of chromosomes during prophase and during anaphase of mitosis:

  prophase - The chromosomes condense and thicken, becoming more visible. The chromosomes consist of 2 sister chromatids joined together at their centromere. Centrioles move to opposite poles of the cell

  anaphase - centromere splits and the sister chromatids separate as they're pulled apart to opposite poles of the cell