What makes a molecule a carbohydrate?

Why does the skin of your finger shrink when you wash clothes for a long time?

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

How do you date a sample of rock that you suspect as being one of the earliest on earth