No. eg Kangaroo.
Yes. A gorilla nourishes its baby inside a uterus via an umbilical cord and the baby is born relatively well-developed. All placental mammals, or eutherian mammals, do this.
All mammals are developed in the womb.
yes. they are born naked but mammals such as rabbits are born with a fur coat.
NO, all mammals except platypus are born live.
Mammals need well developed senses for the same reason that all animals need well developed senses. The goal of every organism is to survive and reproduce. Mammals are heterotrophs, so in order to survive, they must eat. And mammals must sense food in order to find and eat it. Also, mammals need some way of detecting danger, such as a predator or a poisonous plant, so well developed senses are needed. Finally, mammals must sense out a mate in order to reproduce.
All whales are mammals. As are dolphins as well.
two. like all mammals :)
(1) Only mammals nurse their babies on the mother's milk. (2) Only mammals have hair. (3) Mammals are warm-blooded. Birds are warm-blooded, too, but nearly all other animals are coldblooded. (4) Mammals have a larger, more well-developed brain than other animals. (5) Most mammals give their young offspring more protection and training than other animals.
Marsupials refers to an order of mammals that incubate their young, which are born very undeveloped, in pouches on their mother's abdomen. Marsupials include koalas, kangaroos and possums. Not all marsupials have a pouch, properly known as a marsupium, but most do have well-developed pouches.Marsupials are a class of mammals that live primarily in Australasia. They have pouches and include the species kangaroos, wallabies, and wombats.
Cattle are mammals - they are born alive from their mothers and fed milk, like all other mammals.
Grizzly bears are mammals, and like almost all mammals, are born alive.
All mammals are born by the mother giving live birth to them. However there are two exceptions to this rule. Platypus and Echidnas are mammals but they lay eggs. Which is extremely unusual for a mammal.