There are several species of the camel family alive today. Scientists think these species evolved from a common ancestor that lived in North America about 45 million years ago (Mya). • where four modern species of the camel family live today • how the ancestors of these camels migrated from North America Explain how several different species of camel could have evolved from a common ancestor over 45 million years. – 7082

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1. Separate camel populations are isolated by physical barriers like the sea or mountains. Different habitats between these populations, such as differences in food or predators, cause variation. Each population has genetic variation due to mutations. Over 45 million years, enough mutations have built up. Natural selection means camels better adapted to their environments survive and reproduce, passing on their favorable alleles to their offspring.

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