Questions and Answers
What distinguishes amniotes from non-amniote lissamphibians?
Development of three extraembryonic membranes
During which period did amniotes evolve from amphibian ancestors?
Carboniferous period
Which group do synapsids belong to?
Mammals and extinct ancestors like therapsids
What are the three main amniote features crucial for living on land?
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What is the function of the chorion in amniotes?
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Study Notes
Amniotes vs. Non-Amniote Lissamphibians
- Amniotes are distinguished from non-amniote lissamphibians by the presence of certain adaptations that enable them to reproduce and thrive on land.
Evolution of Amniotes
- Amniotes evolved from amphibian ancestors during the Carboniferous period.
Synapsids
- Synapsids belong to the group of amniotes.
Key Amniote Features
- Three main features crucial for amniotes to live on land are:
- Amnios (amniotic membrane)
- Chorion
- Allantois
Function of the Chorion
- The chorion is a membrane that surrounds the embryo and provides it with oxygen and nutrients, while also removing waste products.
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Description
Test your knowledge about the evolution of amniotes, a diverse group of tetrapod vertebrates that evolved from amphibian ancestors. Learn about the two main groups of amniotes, sauropsids (reptiles and birds) and synapsids (mammals and extinct ancestors).
