A young lady with type O blood gave birth to a baby with type O blood. In a court case she claims that a certain young man is the father of her child. The man has type A blood. Could he be the father? Can it be proven on this evidence alone that he is the father?

Yes, He could be the father.

Explanation:

In this case, the mother of the child have OO genes and the father either have AA genes or AO genes, therefore the child could either be A or O but in this case the child is O.

The child inherited the O Gene from the mother and it was expressed phenotypically which makes the child to have O blood group.

Thr father have AO genes and the mother have OO genes which signify that the two parents contributed Their O genes and the baby inherited OO genes and that is the reason the child's blood group is O.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

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.