Form 2 Biology CD - Order Today


By the end of this lesson you should be able to:

  • Define the term gaseous exchange
  • State the importance of gaseous exchange in plants
  • Explain three mechanisms of opening and closing of stomata
  • Describe the internal section of the root, stem and leaf of terrestrial plants.
  • Describe the internal section of the root, stem. and leaf of aquatic plants
  • Compare the internal cross section of the leaf, stem and root of terrestrial and aquatic plants
  • Identify the various respiratory structures in animals.
  • State how the characteristics of respiratory surfaces adapt them to their function.
  • Explain the mechanism of gaseous exchange in protozoa, insects, fish, frogs and mammals.
  • Explain the factors determining energy requirements in man.
  • State the causes, symptoms and preventive measures for respiratory diseases.