Mention the evolutionary significance of the following organisms :
(a) Shrews
(b) Lobefins
(c) Homo habilis
(d) Homo erectus
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I think Lobefins.........
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(a) Shrews The first mammals. These were long tailed, insectivorous, squirrel-like organisms. They gave rise to primitive primates. For example, leones, tarsiers at the beginning of the Palaeocene era.
(b) Lobefins The first amphibians. Modern day frogs and salamanders have evolved from them.
(c) Homo habilis The first human-like primates, lived in Africa about 2 million years ago. They had brain capacity of 700 cc. Also called handy man as they were first and most skillful tool makers.
(d) Homo erectus They appeared after Homo habilis, 1.7million years ago. They had large brain capacities, i.e. 800-1100 cc and were omnivores.
(b) Lobefins The first amphibians. Modern day frogs and salamanders have evolved from them.
(c) Homo habilis The first human-like primates, lived in Africa about 2 million years ago. They had brain capacity of 700 cc. Also called handy man as they were first and most skillful tool makers.
(d) Homo erectus They appeared after Homo habilis, 1.7million years ago. They had large brain capacities, i.e. 800-1100 cc and were omnivores.
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