The characteristics of mammals are: - Reproduce by giving birth - Breastfeed - Life on land and in water - Have two pairs of limbs (pair of legs and a pair of wings or a pair of legs and a pair of hands) - Warm-blooded - Breathe using lungs - His body covered with fine hairs or rough - Tip of his finger nails - Have a pair of eyes - How to get food [..]

Mammals such as rats, dogs, cats, within a period of birth can give birth to more than one child because it has more than one womb or uterus. Mammals that reproduce by laying eggs is the platypus. Reproductive performance in male mammals is the testis, vas deferens, penis. In mammals, the eggs produced by the ovaries. Ovulation in mice may occur ev [..]