Question 1:
Give an example of characteristics being used to determine how close two species
are in evolutionary terms.
Answer:
The presence of feathers in dinosaurs and birds indicates that they are evolution-
arily related. Dinosaurs had feathers not for flying but instead these feathers
provided insulation to these warm-blooded animals. However, the feathers in birds
are used for flight. This proves that reptiles and birds are closely related and that
the evolution of wings started in reptiles.
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