problem1) Answer all the problems:

i) prepare important features of Balanoglossus.

ii) With the help of appropriate diagram describe the external features of etromyzon.

iii) describe the lateral line system in scoliodon.

iv) Briefly describe Neoteny in Urodelo.

v) prepare brief note on Egg–laying mammals.

problem2) prepare an essay on modifications of aortic arches in vestebrates.

problem3) prepare down brief classification of mammals stating important characters and exs of each order.

problem4) describe the vertebral column of varanus.