biology paper 1

• What is the job of the pulmonary artery?


  Carries deoxygenated blood from the heart to the lungs.
• What is the job of the pulmonary artery?

  Carries deoxygenated blood from the heart to the lungs.
• What is the function of the nucleus?
• what is the job of the nucleus?


  Controls the cell and contains DNA
• what is a prokaryotic cell?


  A cell without a nucleus or membrane-bound organelles.
• What is active transport?


  Active transport is the movement of molecules or ions across a cell membrane against their concentration gradient, requiring energy in the form of ATP.
• what is a eukaryotic cell?


  A cell with a nucleus and membrane-bound organelles.
• What is HIV spread?


  Through bodily fluids.
• Advantages of red blood cells:

  -        More red blood cells means more haemoglobin present

  -        Therefore more oxygen can be transported

  -        More oxygen allows for more aerobic respiration which is needed
• process of xylem


  transpiration