Question

A blue whale lives in water , a bat can fly and a man can walk on two feet , still these animals are grouped together . Name the group and state the basis of their grouping by giving four points. ( 5 marks )

Answer 1

they all belong to the phylum-mammals
the similarities among them are
(1)they all have mammary glands and thus can feed their young ones
(2)they all have external ears
(3)they all have external hair
(4)they all are mostly viviparous except platypus