Biology

• What is the structure at x?

  bronchiole

  
• The answer is A

  
• • inhaled air contains more oxygen (than exhaled air) / inhaled air contains less carbon dioxide than exhaled air
  • oxygen has diffused into the blood / carbon dioxide has diffused out of the blood
  • oxygen is used by respiration
  • carbon dioxide is produced by respiration
  • nitrogen is not used/released

  
• • exhaled air is a mixture of inhaled air and alveolar air
  • no gas exchange occurs in the trachea/ bronchi/ bronchioles
  • gas exchange only (occurs) at the alveoli

  
• The answer would be protein option c

  
• • less/no light (energy) absorbed/ taken in
  • (less) photosynthesis
  • (less) glucose
  • (less) starch/ cellulose/ less energy (for growth)/ less ATP made/ less active transport/ (less glucose so) less respiration

  
• What does CORMMS stand for?

  c- change

  o- organism

  r- repeat

  m- measurement 1

  m- measurement 2

  s- same
• Describe how to test a sample of milk for protein:

  • add biurets solution
  • colour change from blue to purple
• the answer is A- aphid

  
• The answer is D- all of the different species in the area

  
• the answer is B- carbon, hydrogen and oxygen only