Answer:
the gas bladder in fishes as it can help them to maintain their buoyancy in water
Mutation is the only evolutionary mechanism that does little to change allele frequencies.
Plasmids are small DNA fragments that occur in many bacterial cells.
Answer:
It basically means that, because of the drought certain foods will be unavailiable. the birds will have to start eating other foods and over time evolution will change their beaks so that the can eat the new food easier.
Explanation:
First cousins share a grandparent, second cousins share a great-grandparent.
