Mention the evolutionary significance of the following organisms :
(i)Shrews (ii)Lobefins (iii)Homo habilis (iv)Homo erectus

Explanation

a) Shrews : The first mammals were like shrews. Their fossils are small sized.
b) Lobefins: In 1938, a fish caught in South Africa happened to be coelacanth which was thougth to be extinct. These animals called lobefins evolved into the first amphibians that lived on both hand and water. There are no speciments of these left with us.
c) Homo habilis: Two mya, Australopithecines probably lived in East African grasslands. Evidence shows, they haunted like being hominid and was called homo habilis.
d) Homo erectus: They had larged brain around 900 cubic centimeters. They probably ate meat. They used to hides to protect their body and buried their dead.