They are multicellular eukaryotic heterotrophs lacking a cell wall and capable of independent movement. Laymen terms; They have more than one cell in their body that lacks a wall but has a thin flexible membrane. They eat, drink and can move on their own.
They do not lay eggs when giving birth, and are warm-blooded.
It is rephrased as mammals are homeothermic animals .
Only monkeys are mammals among those animals you named.
Most simians have a similar skeleton to humans.
They are egg-laying mammals.
There are many characteristics that are used to group animals and mostly they are based on their adaptations and behaviors. However, size is not among such characteristics.
I don't know all of them but the Spotted Skunk is among those treasured animals
Animals do appear to experience sadness similar to what a human experiences. Causes are often similar as well - relocation, loss of a pack member, death in the family, etc.
no
The circulatory system of a cow is similar to the one in other mammals. The main components are the heart, blood vessels and of course the blood among others.
Yes they do, Homo Sapiens are Mammals. Hunting is often a popular sport among humans, unfortunately most of it is not for food but for sport.
Mammals were apparently the only group of animals among all known jawed vertebrates that could not undergo parthenogenesis.
Marine mammals live and water and they need to surface to breathe. While land mammals can breathe just as humans do.