●Mammals are found in a variety of habitats such as deserts, plains and mountains.
● They differ in the type of jaws and sexes are separate and fertilization is internal.
●They have pairs of limbs ,used for walking, burrowing, climbing etc.
●Their mammary glands produce milk to nourish their young ones.
●They are warm-blooded which helps them maintain their body temperature in different weather conditions.
●They have hair-like structures which act as insulation against cold temperature .
●The 4-chambered heart is present in mammals.
●The brains are more developed. ●Examples of Mammals: Humans, Whales, Dogs, Camels, etc