The answer is, different versions of the same gene are called alleles
Some ways to describe why the beaks are different from the birds that will only eat nectar and the birds that eat fruit are; the nectar eating birds have longer and thinner beaks. The beaks of the fruit and seed eating birds have have shorter and thicker beaks.
In alimentary canal, food get digested by the action of many enzymes secreted by various glands including Liver, Pancreas and salivary glands....
Answer:
water is evaporated into the air then the water molecules get too heavy and come back down as snow/rain/ect
