(a) ldentify specimens O, P, Q, and R.

Specimen O;                 Specimen P;              Specimen Q;          Specimen R;

(b) Name three external features you can observe on specimen O

(c) State two functions of each of specimens Q and R to the animal which possesses them.

(d) Mention one common disease associated with specimen O and state one control measure of the disease

(e) Name one parasite which may be found attacking each of specimens P and R.