Evolution(the review)

1. A population of snails live on grey colored rocks at the beach. The variation of shell color ranges from very light to very dark. Dark and light colored shells are easily seen and caught by seagulls. Over time, there are fewer light and dark colored snails and most of the population is grey. This is an example of which type of selection?

A. Directional SelectionB. Stabilizing SelectionC. Disruptive SelectionD. Artificial Selection

2. Isotope X has a half-life of 2,000 years. After 8,000 years, what fraction of the isotope will remain

A. ½B. 1/3C. ¼D. 1/8E. 1/16F. No radioactive

sample will remain

1st half life- ½ of sample remains2nd half life- ½ of the remaining ½ decays – leaving ¼3rd half life- ½ of the remaining ¼ decays – leaving 1/84th half life- ½ of the remaining 1/8 decays – leaving 1/16

3. These pictures show examples of what type of structures? The inheritance of this pattern was passed down from common ancestors.

A. Analogous structuresB. Homologous structuresC. Vestigial structures

Analogous s

tructu

res

Homologous s

tructu

res

Vestigial st

ructu

res

0% 0%

100%

4. The picture to the left shows an example of what type of evolution?

A. Convergent EvolutionB. Divergent EvolutionC. Coevolution

Increasingly different gene pools from a common ancestor= divergent evolution.

5. Polar bear fur color is an example of what type of adaptation?

A. MimicryB. CamouflageC. Vestigial structure

6. Which islands did Charles Darwin travel to when he went on his famous trip onboard the Beagle?

A. HawaiianB. GalapagosC. CookD. Marshall

7. Which of the following is NOT a requirement for natural selection?

A. variation must exist for the trait

B. the trait must be heritable

C. the trait must lead to differences in survival and/or reproduction rates

D. the trait must make the organism stronger

8. This rate of evolution proposes that speciation may occur in rapid bursts followed by long periods of stability.

A. GradualismB. Punctuated

Equilibrium

9. The process in which humans change the gene pool of a species through specific mating of the plants/ animals with desirable traits.

A. Artificial SelectionB. Selective BreedingC. Sexual SelectionD. A and BE. B and CF. All of the above

10. If an organism is bipedal, that means they can:

A. Walk on two legsB. See in 3-DimensionsC. Grasp objects with their

thumb and fingersD. Ride a bicycle.

11. Consider the picture below. The oldest layer of sediment is on the

bottom. Which law describes this?

A. Law of sedimentB. Law of layersC. Law of

superpositionD. Law of ages

12. Which of the following is an example of a vestigial structure?

A. Ostrich wingB. Eagle wingC. Bat wing

13. Which of the following is an example of mimicry?

A. A______

B. B.____

C. C

14. The dolphin, a shark, and an ichthyosaur shown in the picture have a similar body shape. The closer relatives of dolphins and ichthyosaurs did not have this shape. This is due to which type of evolution?

A. CoevolutionB. Divergent EvolutionC. Stabilizing EvolutionD. Convergent Evolution

15. What led to speciation occurring with the two populations of owls shown in the picture?

A. Stabilizing SelectionB. Disruptive SelectionC. Directional SelectionD. Geographic Isolation

16. When would convergent evolution occur?

A. If two species face different selective pressure.

B. If two species face similar selective pressure.

C. If two species are living in close association and are acting as a selective pressure on the other species.

Ancestor to Birds Ancestral Mammal

Convergent Evolution

17. The graph below shows the beak size distribution for a bird species (with 10 mm being the average size). If the size of the available seeds increases so that beaks longer than 10 mm are an advantage for survival, what process is occurring?

A. Disruptive selectionB. Stabilizing selectionC. Directional selectionD. Convergent evolution

18. DNA sequencing is considered more reliable than anatomical comparisons (how similar the body structures are) in determining the evolutionary relationship of species because of the possible effects of …

A. Divergent evolutionB. Convergent evolutionC. CoevolutionD. Disruptive selection

19. Isotope Y has a half life of 100 years. If the initial sample of isotope Y is 200 grams, after 300 years how much of the radioactive isotope should remain?

A. NoneB. 12.5 gramsC. 25 gramsD. 50 gramsE. 66 gramsF. 100 grams

With a half life of 100 years, a time span of 300 years = 3 half-lives.

After 3 half-lives, 1/8 is left.

1/8th of the starting amount of 200 grams= 25 grams

20. I am going to rock this test!

A. TrueB. False

1. B2. E3. B4. B5. B6. B7. D8. B9. D10. A11. C12. A13. C14. D15. D16. B17. C18. B19. C20. A