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Amniotes Evolution Quiz

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Questions and Answers

What distinguishes amniotes from non-amniote lissamphibians?

Development of three extraembryonic membranes (correct)

Presence of gills for respiratory functions

Ability to lay eggs on land

Possession of a slimy and permeable skin

During which period did amniotes evolve from amphibian ancestors?

Devonian period

Carboniferous period (correct)

Permian period

Jurassic period

Which group do synapsids belong to?

Mammals and extinct ancestors like therapsids (correct)

Pelycosaurs and therapsids

Reptiles and birds

All living terrestrial vertebrates

What are the three main amniote features crucial for living on land?

<p>Presence of an amniotic buffer, water-impermeable cutes, and a robust air-breathing respiratory system</p> Signup and view all the answers

What is the function of the chorion in amniotes?

<p>Gas exchange</p> Signup and view all the answers

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).