This evogram (Figure 4.23) illustrates the lineages of therapods by arranging th

Question

This evogram (Figure 4.23) illustrates the lineages of therapods by arranging the branches of a cladogram along a timeline (top). Some of the key character changes that distinguish each branch of theropods are listed at each node. The thick lines show the ages of known fossils, and the ages of the nodes are estimates based on the known ages of the fossils Explain why living birds are considered dinosaurs. What traits) distinguish living birds from theropod dinosaurs? Which branches of theropods have feathers? Which branches may have been able to fly?

Explanation / Answer

Answer

The living birds are consider dinosaurs because it has similarities with the theropod dinosaurs. It is consider that the living birds are the ancestor for the dinasours.

Birds are toothless beak, fused wing digits, short feathered tail. But Dinasours have feather are large, and they are big in size compare to the birds.

The branches have feather are Archaeopteryx, Oviraptorisaurs, Tryannosaurs, Dronosaurs

The branch that fly is Archaeopteryx

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