Download Microevolution - MrCarlsonsBiologyClass

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Microevolution
Natural Selection, Mechanisms of Evolution, and Evidence
1. When a farmer breeds only his or her best livestock, the process involved is:
2. During his voyage on the Beagle, Charles Darwin made many observations where?
3. A structure or behavior that helps an individual survive in its environment is referred to as a(n)
4. Charles Darwin called the ability of an organism to survive and reproduce in its environment
5. When lions prey on a herd of antelopes, some antelopes are killed and some escape. Which part of
Darwin’s concept of natural selection might be used to describe this situation?
6. Give three key ideas of natural selection, and one idea that is false:
7. List three things that are true of microevolution, and one that is false:
8. A gene _____________ is all of the genes in a population.
9. A change in a sequence of DNA is called a
#2
10.
As an ice age makes medium fur less advantageous for survival, the longer-haired tiger begin to survive
better. This creates a natural selection that favors one extreme of the population. This is called
11. When individuals with an average (medium) form of a trait have the highest fitness, the result is
12. When a new member enters a population, the genetic composition (allele frequency) can be affected.
This type of change in the population’s gene pool is called
13. List a truth of disruptive selection?
14. Many things in nature (like frog color frequency) form a bell curve when graphed. This shows that
most individuals are
15.
In humans, the pelvis and femur, or thigh bone, are involved in walking. In whales, the pelvis and femur
shown above have no purpose. This makes the whale femur a(n)
16.
The similarity in forelimbs shown above suggests a common ancestor for these species. Therefore, these
similar body parts are considered a(n)
17. All organisms have __________, suggesting that they are related.
18. List three things that are correct about microevolution and one that is not:
19. The fossil record suggests that
20. Fossils can be (list three things) :
21. Closely related species
22. I used to think microevolution was………………………
23. But now I think microevolution is……………………………….