AP BIOLOGY

Detailed explanation-1: -Answer: All mammals have fur or hair, give birth to live young, have lungs and need air to breathe, are warm blooded, have four limbs if they live on land, and feed their babies milk from their breasts.

Detailed explanation-2: -Baby pigs, dolphins, bats and elephants all drink milk! Because the babies rely on their mother’s milk to live, the mammal mommies have to care for their young. The length of time varies from a few weeks for mice to many years for humans!

Detailed explanation-3: -Mammals are a group of vertebrate animals. Examples of mammals include rats, cats, dogs, deer, monkeys, apes, bats, whales, dolphins, and humans. Figure 6.2 shows some examples of mammals.

Detailed explanation-4: -Mammals are divided into three groups-monotremes, marsupials and placentals, all of which have fur, produce milk and are warm-blooded.

Detailed explanation-5: -Mammals can be generally classified into three broad groups: egg-laying monotremes, marsupials, and placentals. A marsupial is a mammal that raises its newborn offspring inside an external pouch at the front or underside of their bodies.