Mammals with arboreal ancestors (Example: monkeys)
Primates
Mammary glands allow mammals to do this
Nurse their babies
Largest mammal alive today
Blue whale
Nurse their young
Yes
Mammal whose young are kept in pouches
Marsupials
Most mammals are born this way
Live
These mammals make up 40% of all mammal species, including rats, mice, etc.
Rodents
Hairless
No
Formal name of hooved mammals
Ungulates
All mammals have this on their body, even if only a very little
Hair
Bat
Lays eggs
Maybe
Formal name for egg-laying mammals
Monotremes
Most mammals maintain constant body temperature; in other words, they are this
Warm-blooded
This ungulate has been used as a means of transportation and labor for thousands of years
Horse
Temperature regulated by environment
No
Formal name for mammals who have adapted to aquatic life
Cetaceans
Formal word for "gives birth to live young"
Viviparous
Venomous mammal who can pick up electrical signals given off by the muscles of its prey
Platypus
Carnivores
Maybe