4.
American bald eagles and African fish eagles originated from a common ancestor. The
table shows the differences between the American bald eagle and African fish eagle.
Location
Average Size
Diet
Beak
American Bald Eagle
North America
6.6-14 pounds
small rodents
yellow beak
African Fish Eagle
Africa
4.6-7.9 pounds
fish
black tip on yellow beak
How did the birds become separate species?
A The common ancestor population moved to the two continents while still being able to
interbreed with each other through migrations.
B
The common ancestor population mated with new birds on the two continents shortly after
separation, causing the two new species.
C
The common ancestor population was divided between the type of food that individuals could
catch, and individuals followed their food to the two continents.
D
The common ancestor population was separated between the two continents and began to
adapt to the new ecosystems over many generations.