What are the unique characteristics of the class mammalia?

Answer 1

Common defining characteristics of mammalia are

1. endothermic body plan

2. 4 chambered heart

3 hair of some kind

4 3 middle ear bones

5. sweat glands 6. warm blooded

Answer 2

Their bodies are covered with hair, they are Viviparous which means they have a live birth, they nurse their young with milk from mammary glands, they have a diaphragm that separates their thorax from their abdomen, they have a 4 chambered heart, Highly developed brain allows them for more memory and intelligence, 2 pair for thumbs, and they have a long parental care.

• Mammals have mammary glands
• They are warm blooded
  
• They have hair
• They have a middle ear bone
• They have a neocortex region of the brain
• They have sweat glands
• Except for the three species (which lay eggs), all mammal species give birth to live young.

Answer 3

Animals of the class Mammalia share many defining characteristics. For example, all mammals breath oxygen with their lungs. They also give birth to live offspring.

Answer 4

One characteristic would be the presence of hair

Answer 5

Humans have hair, warm blooded, give birth to live young, and have large and continually developing brains.

Answer 6

They have mammalia (feeding nipples), hair and give birth to live young.

Answer 7

They give birth to live young