This question was very popular with the candidates.  In question 4(a), majority of the candidates could identify specimens O (Animal horn) and P (Animal skin).  Also in question 4(b), many candidates were able to state farm animals which do not possess specimen O. 
In questions 4(c)(i and ii), most of the candidates could name farm animals in which both sexes possess specimen O and state farm animal in which only one sex of the species possesses specimen O.  Also, in question 4(d), many candidates were able to state functions of specimen O and P to the animals that possess them.  However, in question 4(e), majority of the candidates could not mention problems that a farmer may encounter in the management of animals which possess specimen O.

The expected answers include:

  Problems a farmer may encounter in the management of animals which
    possess specimen O (Animal horn)
 -     Problems of space when transporting the animals
-      Animals may injure the owner or herdsmen with the horns
-      Animals may injure one another with the horns
-     Animals may use horns to destroy buildings and other farm structures
-     Animals with horns bully their young ones and those without horns
-     Requires larger housing space and more pens spaces