You might think of milk only as something you drink, but milk is actually a highly nutritious food. People enjoy
drinking milk in its natural form and also use it to make a
wide range of food products, including cream, butter,
yogurt, cheese, and ice cream.
Female mammals produce milk to feed their newly
born young. Each species of mammal produces milk
specially designed to meet the needs of its infants. For
instance, the milk of animals that need to develop a thick
layer of insulating fat, such as seals, has a high fat
content. The milk of animals that grow rapidly, such as
Cows, which double their birth weight in 50 days, is rich in
protein and minerals.
Cow milk typically contains about 3.5 to 5 percent fat,
which is present throughout the milk in globules. In
addition to providing milk's distinct taste and texture, fat
supplies vitamins A, D, E, and K, as well as certain fatty
acids that the body cannot produce on its own.
Milk contains many minerals. The most abundant are
calcium and phosphorus, as well as smaller amounts of
potassium, sodium, sulfur, aluminum, copper, iodine,
manganese, and zinc. Milk is perhaps the best dietary
source of calcium—one quart of milk supplies as much
calcium as 21 eggs, 26 pounds of lean beef, or 5 pounds
of whole wheat bread.
Based on the informationin the selection, which of the following relationships is most similar to the relationship below? (seals: fat) A.) calcium:bread B.) cows:protein c.) vitamins: A, D,E, K