No, birds do a pretty good job of taking care of their young!
Yes. Mammals are the only animals that feeds milk to their young.
Mammals are the only vertebrate group which feed their young on mothers' milk.
Mammals are the only animals that nourish their young with milk, a substance containing proteins, calcium, fat, and Vitamin C.
Milk teeth would, by definition only occur in mammals, since mammals are the only animals that produce milk for their young. Other animals may well have a set of deciduous teeth that are replaced by adult teeth as they mature.
The presence of a backbone (a "vertebrae") does not DEFINE a mammal because other animals also have backbones, eg reptiles, birds and fish - these animals are also "vertebrates".Mammals are mammals because they are the only animals to have fur/hair and feed their young on milk.
No, they do not. Amphibians lay eggs in water. The eggs give the embryos all the nutrition they need until they hatch. After that, they're on their own and live on small insects. No. Only mammals feed their young milk.
No. The only group of animals that suckled milk from the mother are mammals. Octopuses are not mammals, nor even vertebrates.
It is different depending on the type of mammal We are mammals, and we usually care for our young until we die. Cows care for their young for at least two years, but young are slaughtered at two weeks old.
No. Most reptiles don't care for their young, with the exceptions of crocodiles and other members of that family. When a mother lizard lays her eggs, she will watch them until they hatch. When they hatch, the mother lizard will leave, leaving the babies to fend for themselves.
No. Only mammals do.
yes
(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.