QS
characterists hair coverd skin
mammals/ mammals
placenta
allows the embryo to be nourished with eh matters blood supply
rhynchocephalia
tuatara
what are ectothermic
reptiles
how do mammals keep them warm
under it insults the mammal and keeps it warm
Gestation
time during which embryo develops before being born
squamata
snakes and lizards
what are endothermic
birds/ mammals
smooth barbules but no hooked barbules
down feathers
exothermic
when they use their own Body heat
testudines
turtle and turtoises
endotherm
warmed by a heat generating metabolic process
hooked and smooth barbules allowing the barbules to interlock
contour feathers
hemotoxin
crocodilia
alligator and crocodile
amniotic egg
mammal embryos to develop on land
Preening
they are hooking the barbules back together bye using the oils