this helps mammals retain heat

it also helps as camouflage for many mammals

in cats, whiskers are a modified form of ______ that allows sensory input

they produce milk

mammary glands produce milk that contains:

these bones are present in all tetrapods

these bones are unique to mammals

while other animals take big chunks of food, mammals chew with their

this makes digestion more efficient as it begins earlier in the digestive track

it's made of three bones, 2 of which are exclusive to mammals

mammals can breathe and chew at the same time

Eutherians are the only animals that develop inside a placenta

monotremes keep some ancient traits such as sprawling posture

pigs, dogs and cats have

primates have

cows have