how many types of animals grouped Page No Date: 1 since
Answers
Answer:
Classify animals into major groups (mammals, birds, reptiles, amphibians, fish, arthropods, vertebrates, invertebrates, those having live births and those which lay eggs) according to their physical characteristics and behaviors.
Answer:
The Ediacaran animals
The Cambrian "explosion" and the Burgess Shale
What caused the Cambrian "explosion"?
A foot on the land
The earliest vertebrates
Appearance of the fish
The jawless fish
Colonisation of the land
Problems encountered in the move to land
The evolution of amphibians
What drove amphibian evolution?
Early reptiles and the amniotic egg
The early mammals
Developments in the dinosaur lineage
Further developments in the early mammals
Taking wing: Archaeopteryx and the origin of the birds
The end of the dinosaur age
The appearance of modern mammal groups