9. Biogeography is the study of changes in the species as they evolve in relation to how their geography changes over time. For example, Emus, ostriches and Rhea live on different continents. Label the continents below that you can find each bird on. These birds are more closely related to each other than the species in their own continents. Explain how this can be so based on the geologic past of these continents.

Q: The pr O Allo O Dep radi O Alla dete O Pred

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Q: Paraphyletic groups

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A: Ans :- OPtion (a) is right ---- Punctuated equilibrium

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Q: Adaptive Radiation

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A: Speciation is the mechanism of origin of new species.

Primate evolution

Primates are a relatively new species and first appeared in the fossil record nearly 55 million years ago. They may have originated as far back as the cretaceous period. Their fossils were observed in North America, Asia, and Europe. Long before the first monkeys and their prosimian relatives developed, most animal species thrived and died. The first primates did not exist until about 50-55 million years ago, even though the planet is 4.54 billion years old and the first life goes back at least 3.5 billion years. Dinosaurs had been extinct for 10 to 15 million years when this happened.