Practice Test1. What is it called when humans have the ability to CHOOSE traits they want an animal to have?

2. What would be an advantageous trait for a bird that needs to catch its prey in the air?

3. These organisms share __________ structures.

__________ structures have similar _________ and ____________.

4. Why do these birds have different beak shapes/sizes?

5. Which rock layer is the OLDEST? Which rock layer is the YOUNGEST?

6. Fossils found in the top layer are the _________. Fossils found in the bottom layer are the ________. The oldest fossils formed ________ (first/last). The youngest fossils formed ________ (first/last) Ages of rock layers can be determined by analyzing their relative ________ (position/density).

7. Because DNA codes for protein, what would happen to the protein if the DNA was mutated?

8. Which tortoise is BEST adapted to eating tall plants?

9a. Does biodiversity (variety of life) Increase or Decrease during a mass extinction?

9b. After a mass extinction, does biodiversity begin to Increase or Decrease?

10. Selective breeding allows humans to breed animals for desirable _____.

11. Over time, natural selection caused a change in the ant eater’s tongue length. 11a) Which two traits are shown?

11b) explain the change in the ant eater’s tongue length 11c) explain WHY there might be a change in tongue length (hint: think about their food source)

12. Look at the graph below: There was a drought in 1977. Birds who could not eat the large seeds died of starvation. Why do you think the length, depth, and width of the beaks changed in 1978?

13. Does the environment determine an organism’s traits, or do an organism’s traits determine the environment?

14. What is it called when organisms that are fit to their environment survive and reproduce, and organisms that are not fit to their environment die and DO NOT pass on their traits?

15. Over time, what is happening to the brown beetle population? What about the green beetle population?Color Variation Percentages in June

Brown Variation Green Variation1st Generation 22.66% 77.34%5th Generation 40.21% 62.87%

10th Generation 41.41% 58.59%15th Generation 63.13% 36.87%20th Generation 71.26% 28.74%

15b) Why do you think there is this change in beetle population? (Think about environment)

16) Which sequence describes the relationship between DNA and protein?a) DNA Gene Protein Traitb) DNA Base triplets amino acid sequence protein traitc) none of the above

17) If there are no fossils found in the middle layer, but there are different types of fossils found above and below the middle layer, what does that tell us?