8704015
Description
Mind Map by Odei Antxon Sarasa Zunzarren, updated more than 1 year ago
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Created by Odei Antxon Sarasa Zunzarren
about 9 years ago
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the evolution of vertebrates
- ostracoderms
- fossil evidence indicates that they were small fish with big
bony plates in their head and they did not have a jaw
- 400 million years
- fossil evidence indicates that they were small fish with big
bony plates in their head and they did not have a jaw
- amphibians
- fish with lungs came out of the water
- 350 million years
- fish with lungs came out of the water
- 300 million years
- reptiles
- dindn´t need to live in water due to
the evolution of their eggs. Their
eggs are amniotic, have a hard shell
which prevents the eggs from
drying out. The amnion protects
and nourishes the embryo during
its development
- dindn´t need to live in water due to
the evolution of their eggs. Their
eggs are amniotic, have a hard shell
which prevents the eggs from
drying out. The amnion protects
and nourishes the embryo during
its development
- reptiles
- 240 million years
- mammals
- evolved from a group of reptiles that were quadrupela, called therapids
- evolved from a group of reptiles that were quadrupela, called therapids
- mammals
- 255 million years
- birds
- like mammals they evolved from a group of primitive reptiles
- like mammals they evolved from a group of primitive reptiles
- birds
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