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S2 Geologic Time 03: Origin and Evolution of Life

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Withney Sainvil

on 29 June 2015

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Transcript of S2 Geologic Time 03: Origin and Evolution of Life

Hello,and welcome to a "tour". In this presentation you will learn the characteristics, diet, origin, and many other facts.
So let us Begin!
Mammals have existed for the past 200 millions years. The first mammals were carnivores and they were small. Mammals were evolved during the Triassic period. First mammals appeared at the beginning of the Cretaceous period.
Physical Characteristics
All mammals have hair or fur on their bodies. Every mammal is a vertebrate. Mammals produce milk to feed their babies. This allows them to spend more time with their young and teach them important skills they need to survive on their own. Every mammal is warm blooded.
Phylogeny Evolution
Phylogeny is the history of the evolution of a species or group, especially when talking about genetic inheritance.
Biological Evolution
Biological evolution is not just things changing over time. Lots of things change: trees lose their leaves, mountain ranges rise and erode, but these biological evolution because they don't have change with genetic inheritance. The main idea of biological evolution is that all life on Earth shares a common ancestor.
How mammals relate with each other, past and present:
All Present day mammals have relation with at least one animal in the past. For example, the Ekaltadeta and the Kangaroo; The Sivatherium and Giraffe; and the Dire wolf and Gray Wolf.
S2 Geologic Time 03: Origin and Evolution of Life
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