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Mammals have skin with hair or fur, while birds have feathers, reptiles have scaly skin, amphibians have moist skin and fish have scales.
Mammals are warmblooded and have a four chambered heart. The only exception are the birds, who are also warm blooded and have four chambered hearts.
Mammals have three middle ear bones, and a neocortex in the brain. They also have specialised teeth, grinding plates or other features to enable them to crush their food.
Mammals do not lay eggs, unless they are monotremes, i.e. egg-laying mammals, which includes just the platypus and the echidna.
However, the defining characteristic that makes mammals different from other vertebrates is that they lactate, meaning they feed their young on mothers' milk. They have sweat glands, including glands used for milk production. No other member of the animal kingdom has or does this, yet all mammals do, whether they are placentals, marsupials or monotremes.
What else can I help you with?
Is an echidna an invertebrate?
No, an echidna is not an invertebrate. Echidnas are mammals, specifically monotremes, which are a group of mammals that lay eggs.
What primates are herbivores?
Some examples of herbivorous primates include gorillas, howler monkeys, and colobus monkeys. These primates primarily feed on fruits, leaves, and other plant parts as their main source of nutrition.
What animals are diurnal?
There are many mammals which are diurnal, meaning they are active during the day. They include:Numbats (the only truly diurnal marsupial)Horses, cattle, sheep and other stock animalssome domesticated pets such as dogsalmost all primates, such as chimpanzees, gorilla and monkeyssome marine mammals such as dolphins
Do chordates have large brains?
Not necessarily. While some chordates, like humans and other mammals, have relatively large brains compared to their body size, not all chordates have large brains. Chordates range in complexity from simple organisms like tunicates to more advanced vertebrates like birds and primates.
Is binocular vision a characteristic of all primates?
Yes, binocular vision is a characteristic of all primates. It helps in depth perception and enables them to accurately judge distances. This trait is particularly advantageous for primates living in complex environments such as forests.
