Available Answers

1. 1.

   Tick the most appropriate answer.

   1. Oxidation off food that takes place in the presence of oxygen is called
      1. aerobic respiration.
      2. anaerobic respiration.
      3. cellular respiration.
      4. none of these.
   2. These are biconcave, disc-shaped cells of the blood.
      1. platelets
      2. WBCs
      3. RBCs
      4. none of these
   3. The ability of an organism to change for better adjustment with the environment is called
      1. air-borne diseases.
      2. congenital diseases.
      3. acquired diseases.
      4. none of these
   4. Animals that can fly in the air such as birds and bats are
      1. habitat.
      2. adaptation.
      3. acclimatisation.
      4. evaporation.
   5. Animal that can fly in the air such as birds and bats are
      1. arboreal animals.
      2. aerial animals.
      3. terrestrial animals.
      4. land animals.
2. 2.

   Write true or false. Correct the false statements.

   1. The path through which the air travels to the lungs is called the respiratory tract.
   2. Contraction of articles and ventricles makes a sound called heartbeat.
   3. Microorganisms that cause diseases are called pathogens.
   4. The plants that live in water are called xerophytes.
   5. The parenchyma tissues provide buoyancy and flexibility to hydrophytes.
3. 3.

   Differentiate between aerobic respiration and anaerobic respiration.

4. 4.

   Differentiate between red blood cells and white blood cells.

5. 5.

   Differentiate between acquired disease and congenital disease.

6. 6.

   Differentiate between composting and vermicomposting.