All of these finches have similar beaks. What can scientist determine from this observation?
1. They are not related.
2. They live far away from each other.
3. They all have the same bones
4. They descended from a common ancestor
4. They descended from a common ancestor.
Pythons have leg bones inside their body that they don't use anymore. We call these structures...
vestigial structures
transitional fossils
common ancestry
phylogenetic trees
vestigial structures
The fossil record is organized by
age
species
genes
age.
Early embryos of vertebrate include gill slits and tails. What evidence does this provide for scientist?
They all emerge from eggs.
They will become the same animal
Vertebrate come from a common ancestor.
Vertebrates come from a common ancestor.
The Merychippus fossil has similarities between older and younger horse fossils. We can consider the Merychippus fossil a...
common ancestor of the older and younger fossils
transitional fossil
vestigial structure
none of the choices