Study specimens L, M, N, P, Q, R and S carefully and use them to answer questions 4(a) to 4(d).

(a) Name two specimens which can be used for the following: (i) transaction; (ii) protection; (iii) statement.

(b) Stating observable features in specimens L, M, N, P,Q and R, Suggest one reason each for the answers given in 4(a)i), (ii) and (iii) above.

(c) State. (i) two observable similarities; (ii) two differences between specimens P and R.

(d)(i) Sate how observable features of specimen M adapt the specimen to its functions. 

(ii) Arrange specimens L, , N and S in the increasing order of  complexity of the organism to which they belong.