Practice:Biology

Biology is the study of living organisms.

I enjoy reading about new discoveries in the world of Science. =ANIMAL CLASSIFICATION=

*MAMMALIA

 * PISCES
 * CHONDRICHTHYES
 * 1) Cartilagenous endoskeleton
 * 2) Swim bladder absent.
 * 3) Operculum absent.
 * 4) Internal fertilisation
 * OSTEICHTHYES
 * AMPHIBIA
 * REPTILIA
 * AVES
 * MAMMALIA


 * 1) PISCES
 * 2) AMPHIBIA
 * 3) REPTILIA
 * 4) AVES
 * 5) MAMMALIA