Patrick suffers from a genetic abnormality in which delayed blood clotting causes internal and external bleeding.

The answer is Hemophilia.

Explanation:

Hemophilia is a hereditary disease that is characterized by a defect in blood clotting due to the lack of one of the factors involved in it and manifested by a persistence of bleeding. When the blood does not coagulate properly, excessive bleeding (internal and external) occurs after an injury. Symptoms include several large or deep bruises, inflammation and joint pain, unexplained bleeding and blood in the urine or feces.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the fossil record provides evidence of a common ancestor to many species.