fish
which organ help fish to breathe?
gills
amphibians are cold-blooded or warm-blooded?
cold-blooded
reptiles are ectoterm or endoterm?
ectoterm (cold-blooded)
how many chamber hearts does bird have?
four
monotremes, marsupials, placentals
what the function of scale?
which organ does the amphibian use to breathe when their grow up？
skin and lungs
what type of eggs does reptile reproduce?
amniotic
what is the function of feather?
keep them warm and help to fly.
what develops in a sac-like organ called the placenta?
embryo.
what is the function of swim bladder?
help to stay at a certain depth in water.
when frog growth, what the process called?
metamorphosis
how does reptiles reproduce?
internally
what is the function of hollow bones?
be lightweight in the air.
what is the development time called when the embryo stays inside the mother until fully formed?
gestation
what is the function of later line?
detects pressure
why does amphibians lay eggs in water?
because the eggs don't have shell.
give an example of reptiles.
snack, turtles, lizards.
what is this called when bird lay eggs that can develop outside the body?
oviparous
name three types of mammal tooth.
incisor, canine, molar
fish are internal or external?
external
why we say amphibian have two different life?
because they can both live in water and land.
what protect skin to keep moisture inside of a reptile?
scales
a bird with a sharp, curved, what food do they eat?
tearing flesh
how do mammals classified?
according to how their young develop.