Lactose is the disaccharide produced by combining glucose and galactose.
Maltose
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Water.
A disaccharide. With "di" as in two. "Poly" if more than two.
Milk is produced by mammary glands which are found in breasts of mammals.
Milk is produced in the "mammary glands".
When two monosaccharides combine to form a disaccharide, a molecule of water is also produced. This process is known as a condensation reaction, where a hydroxyl group (OH) from one sugar molecule and a hydrogen atom (H) from the other sugar molecule come together to form a water molecule.
Plants
Cellulose is a polysaccharide, not a disaccharide
Arginine
Red Blood Cells are produced in bone marrow in birds as in mammals. The red blood cells are elliptical in birds and have a shorter life span than in mammals.