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Below are diagrams P, Q, R and S. Examine them.
         F3ET1PP3BioQ1

  1. Using observable features in the photographs, complete the dichotomous key given below. 
    1.  
      1. Animals with legs………………………………................go to 2
      2. Animals without legs…………………………………………....snake
    2.  
      1. Animals with two body parts .......................spider
      2. …………………………………………………………..........……go to 3
    3.  
      1. ………………………………………………locust
      2. Animals without wings…………..............Ant
  2. In each case show steps followed to arrived at the identity. (4mks)
     Organism  Steps followed  Identity 
      P Locust
     Q Ant
     R Snake
     S Spider
  3. Using observable features only show how specimen P adapted for locomotion.

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      1. Animals with legs………………………go to 2
      2. Animals without legs……………………….snake
    1.  
      1. Animals with two body parts ……………spider
      2. animals with three body parts………go to 3 
    2.  
      1. animals with wings…………………… locust 
      2. Animals without wings…………………Ant
  1. In each case show steps followed to arrived at the identity. (4mks)
     Organism  Steps followed  Identity 
      P ...1a, 2b, 3a... Locust
     Q ...1a, 2b, 3b... Ant
     R ...1b... Snake
     S ...1a, 2a... Spider
  2.  
    1. P has wings for flight
    2. 3 pairs of legs for walking and hoping for long distance i.e. legs for walking / strong hind legs for hopping.
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