Biology 11 – Factors Affecting Genetic Variation

Factors Affecting Variation and Evolutionary Pathways Blank Notes

Barbellus Assignment:
1.Describe the selection pressures (causes) that lead to the evolution of the 2 main lines of Barbellus (land vs. water).
2.Describe any “missing links” that could be included in your family tree. (What might they have looked like?)
3.Describe the relationship between the age of the fossils and theircomplexity.Are the older ones more complicated looking?
4.Are there any examples where a more evolved fossil appears to have a simpler body than its ancestor? How can you explain this? Can you think of any real life examples?

About Mrs. Dildy

I am a math and science teacher in the Saanich school district.
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