33. What sources did the evidence for evolution come from during Darwin's time?
A: -Fossils: pointed out Earth was way more than 6000 years old.

- Geography: when organisms get separated by various landforms, they adopt and develop new traits essential for survival in the new environment.

- Embryology: similar features of embryos in very different organisms suggest evolution from a distant common ancestor.

- Anatomy: homologous structures were formed in organisms which are features that are similar in structures but appear in different organisms and have different functions.  This suggests that those animals share  a common ancestor.
Whereas, analogous structures are structures that perform a similar function but are not similar in origin.

34. What are vestigial structures?
A: They are remnants of organs or structures that had a function in an early ancestor but no longer used by the current organism.

35. How does molecular and genetic evidence support fossil and anatomical evidence?
A: The comparison of DNA or protein sequences can be used to show probable evolutionary relationship between species.  The more related two organisms are, the more similar their DNA will be.  Molecular fingerprinting can be used to reveal similarities in proteins of an organism.  Other ways are Pseudogenes and Homeobox genes.

 


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