Name:_________​KEY​_______ Date:__________
Galapagos Finch Evolution ​ (HHMI Biointeractive) ​ - ​https://youtu.be/mcM23M-CCog​
​~16 minutes
1. What is the “mystery of mysteries? _________​how new species form​____________
2. The Grants’ study on the island of Daphne Major studied what organisms? _______​finches​_______
3. Where did the 13 species of finches on the islands come from?_____​from the mainland​________
4. How did the Grants catch the finches? _______​nets​______________
5. What features did they measure? _____​size and shape of beak, weight​______________
6. What happened in 1977 to the island? _________​drought​___________________
7. What type of birds were more likely to survive after this event? ___​birds with large beaks​___________
8. After the El Nino event in 1983, which birds were more likely to survive? _____​birds with small beaks​____
9. What keeps different species from mating on the Galapagos islands? ____​songs (and appearance)​_____
10. The most likely scenario explaining the different finches on the islands is that:
a) different birds migrated to different islands
11. Examine the graph below.
b) one species evolved into many different species
Summarize what happened to the finch population between 1976 and 1978.
_______________​the average beak depth became larger​ _________________________
________________________________________________________________________________
12. ​Why​ did the finch populations change from 1976 to 1978?
______​finches had to find food and those with small beaks died, larger beaked birds survived and
passed that trait to their offspring ​_____________
www.biologycorner.com​ | ​ ​https://www.biointeractive.org/classroom-resources/origin-species-beak-finch
Name:_____________________________________ Date:__________
Galapagos Finch Evolution ​ (HHMI Biointeractive) ​ - ​https://youtu.be/mcM23M-CCog​
​~16 minutes
1. What is the “mystery of mysteries? ______________________________________________________
2. The Grants’ study on the island of Daphne Major studied what organisms? ______________________
3. Where did the 13 species of finches on the islands come from?_______________________________
4. How did the Grants catch the finches? __________________________
5. What features did they measure? ______________________________________________________
6. What happened in 1977 to the island? ________________________________________________
7. What type of birds were more likely to survive after this event? ____________________________
8. After the El Nino event in 1983, which birds were more likely to survive? _________________________
9. What keeps different species from mating on the Galapagos islands? ___________________________
10. The most likely scenario explaining the different finches on the islands is that:
a) different birds migrated to different islands
11. Examine the graph below.
b) one species evolved into many different species
Summarize what happened to the finch population between 1976 and 1978.
________________________________________________________________________________
________________________________________________________________________________
12. ​Why​ did the finch populations change from 1976 to 1978?
________________________________________________________________________________
________________________________________________________________________________
www.biologycorner.com​ | ​ ​https://www.biointeractive.org/classroom-resources/origin-species-beak-finch