Answers

2015-05-13T16:59:32+05:30
ON THE BASIS OF THEIR AUTOTROPHIC AND HETEROTROPHIC NATURE,.
LOCOMOTION IS ANOTHER CHARACTERISTIC.

0
2015-05-13T19:14:56+05:30
because   on their characters , mode of reproduction , mode of nutritions ,  present of skeleton , they are flowerable or non-flowerable , coelomates , design of organisms , notochords  , presence of nerve cells   , habitats , presence of heart , etc. 
0