Question

differentciate the nature of skin in four classes
amphibins------------------
reptils------------------------
aves-------------------------
mammalia--------------------

Answer 1

amphibians possess soft skin............Reptiles posses tough skin coated by keratin..........Aves  posses feathers on their body..........Mammals posses skin covered with hair........

Answer 2

amphibians -soft skin
reptiles-tough skin
aves-feathers
mammalia-soft skin covered with hair