Name: ___________________________________
DOK 6 Evolution STUDY GUIDE
Define the following terms.
1.
2.
3.
4.
5.
Extinction _____________ Death of an entire species _________________
Adaptation _____________ A trait that helps the entire population __________________
Mutation _______________ Random changes in DNA____________________________
Natural Selection__________ Organisms with helpful traits survive better _____________
Environmental Pressure _______ Activities or factors, usually influenced by production of
various products that cause change within an ecosystem. ___________________
6. Give an example of extinction _______Dinosaurs____________________________
7. Give an example of an adaptation __________________________________________________
8. Given an example of a mutation _____One seal is born with a change in its DNA sequence that
makes its flipper wider. ______________________________________________
9. Give an example of natural selection __Due to a change in the environment, a few grey moths
are able to blend in to the environment better and survive long enough to produce offspring.___
10. Give an example of an environmental pressure ____ A drought, so the land is too dry.________
Describe the following pieces of evidence for evolution.
11. Anatomical similarity __________Organisms that have a similar skeleton may have come from a
common ancestor.___________________________________
12. Radiometric Dating
___A way to find the actual age of rocks and fossils.________________________________
13. Fossil Record
__The fossil record shows where organisms were located or their distribution in the world.
____________________________________________________________________________
14. Developmental Similarity
_____________Different organisms have similar stages during development.___________
15. Genetic Similarity
__________Similar organisms have similar DNA and may have come from a common
ancestor.____________________________________________________________
Name: ___________________________________
Give an example of each piece of evidence.
16. Anatomical similarity _________The arm of a human is similar to the leg of a cat, the flipper of a
whale, and the wing of a bat._____________________________________________________
17. Radiometric Dating
____________Radio-carbon Dating__________________________________________
18. Fossil Record
__________Dinosaur_____________________________________________________________
19. Developmental Similarity
________________ Humans and fish look similar in the early stages of development _______
20. Genetic Similarity
_________________Humans and mice are both mammals and their DNA is similar._________
21. Describe genetic variation.
_________Different gene combinations that add to the diversity in a population.___________
22. Give an example of genetic variation.
________Purebred Dogs_________________________________________________________
23. Describe a favorable trait.
________ A trait that is beneficial to the organism in some way and will likely be selected by
natural selection to become common in the population because it strengthens the organism in
some way, either physically or chemically, to allow it to survive over its competitors.
______________________________________________________________________________
24. Give an example of a favorable trait.
_________Small beak shape during a drought when only small seeds are available.___________
Name: ___________________________________
Look at the following graph and answer the questions.
25. After the prey population increases, the predator population increases. T F (circle one)
26. Why? _____The prey population increases and supports the predators need for
food.__________________________________________________________________
______________________________________________________________________________
27. When the predator population decreases, the prey population increases. T F (circle one)
28. Why? __ The predator population decreases and the prey is able to reproduce and thrive in the
environment._____________________________________________________________
______________________________________________________________________________
Name: ___________________________________
Look at the following diagram and answer the questions.
29. This environment was once aquatic and was replaced by land. T F (circle one)
30. The diagram shows layers that contain fossils and were formed over a long period of time.
Which statement best summarizes the history of this area?
a. The environment was most recently aquatic.
b. The environment has never been an ocean.
c. The environment was once an ocean filled with fish and became a forest filled with
dinosaurs.
d. The environment has only been inhabited by aquatic animals.