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Charles Darwin's Observations on the Galapagos Islands

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Charles Darwin's Observations on the Galapagos Islands

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Questions and Answers

What is the term used to describe the resemblance between the sugar glider and flying squirrels?

Analogous

What is the primary purpose of the fossil record in understanding evolution?

To document the pattern of evolution, showing that past organisms differed from present day organisms and that many species have become extinct.

What is the main difference between marsupials and placental mammals (eutharians)?

Marsupials are born as embryos and complete their development in an external pouch, while placental mammals complete their embryonic development in the uterus.

What is the term used to describe the shared ancestry of similar characteristics between different species?

Homologous Signup and view all the answers

What is the significance of the similarity between the sugar glider and kangaroos?

It shows that they share a common ancestry and are closely related. Signup and view all the answers

What drove the reduction in size of the pelvic bone in fossil stickleback fish?

Natural selection Signup and view all the answers

What is the main difference between convergent evolution and homologous evolution?

Convergent evolution occurs when different species adapt to similar environments, while homologous evolution occurs when similar characteristics are shared due to common ancestry. Signup and view all the answers

What is the significance of the fossil stickleback fish example?

It demonstrates the power of natural selection in driving evolutionary change over time. Signup and view all the answers

What is the relationship between the sugar glider and flying squirrels?

They are an example of convergent evolution, where different species have adapted to similar environments independently. Signup and view all the answers

What is the significance of the fossil record in understanding evolutionary changes?

It provides a chronological record of the evolutionary history of different groups of organisms. Signup and view all the answers