Bio 101 Week 3 Individual Assignment

"Darwin's Finches and Natural Selection" Evolution Lab

Watch the Power Point on "Darwin's Finches and Natural Selection" including the second one called "Epilogue". Answer the following questions by highlighting the correct choice or typing in your understanding of the concept.

CQ1. Limited gene flow means:

A. Birds rarely move between the mainland and the islands.

B. Birds on the island have the same genes as birds on the mainland.

C. Birds on the mainland don't like birds from the islands.

D. Birds on the mainland won't evolve, but birds on the islands might.

CQ2. Endemic means:

A. The end is imminent.

B. The species isn't found anywhere else.

C. The species has very specific habitat requirements.

D. The species needs to be protected.

E. The species is extinct.

CQ3. What is the average depth of the finches' beaks in Year 1?

A. About 7mm

B. About 8mm

C. About 9.5mm

D. About 10mm

E. About 11mm

CQ4. How much was the biggest difference in beak depth?

A. 2mm

B. 4mm

C. 6mm

D. 8mm

E. 10mm

CQ5. What do you think a graph of population size would look like for Year 1 to Year 3? Explain choice.

CQ6. What was the average beak depth in 1978?

A. Just under 7mm

B. About 8mm

C. About 9mm

D. Just under 10mm

E. Just under 11mm

CQ7. Did the finch population evolve from 1976 to 1978?

A. Yes

B. No

C. Maybe

D. I don't know.

CQ8. Which do you find more surprising? Explain why.

A. Evolution occurs at a rate that we humans can observe.

B. As little as half of a millimeter can make the difference between life and death.

C. Both surprise me.

D. Neither was particularly surprising.

CQ9. If beak depth increased during the drought, primarily due to selective mortality, can we really say that this natural selection was driven by environment favoring the survival of birds with deeper beaks?

A. No, beak depth changed due to birds dying, not to birds surviving.

B. Yes, birds with deeper beaks survived at a higher rate than birds with shallower beaks.

C. I'm really confused.

EPILOGUE Questions (On next page)

CQ10. If small birds are selected against in one year and selected for in another, is evolution still taking place?

A. Yes

B. No

C. Maybe

D. I don't know.

CQ11. How has the average body size of these finches changed 1973-2001?

A. They are much larger.

B. They are a little larger.

C. They didn't change.

D. They are a little smaller.

E. They are a lot smaller.

CQ12. How has the average beak size of these finches changed?

A. They are much larger.

B. They are a little larger.

C. They didn't change.

D. They are a little smaller.

E. They are a lot smaller.

CQ13. How has the beak shape changed?

A. They are a lot more pointed.

B. They are a little more pointed.

C. They didn't change.

D. They are a little more blunt.

E. They are a lot more blunt.