Jawless fish (superclass)
cartligious fish (class)
bony fish (class)
number of chambers in fish heart
salamanders and newts (order)
frogs and toads (order)
number of chambers in heart for tadpole
number of chambers in heart for frog
amphibians with no legs
What appeared first?
number of chambers in heart for reptiles
adaptation to find food
Snakes and lizard (order)
primitive group of reptiles
rub oil from glands onto feathers
number of chambers in heart for bird
earliest fossil of bird
What is hair made of in mammals?
number of chambers in heart for mammal
horses being spooked and eventually lacking a response (what behavior is this?)
dog and bell with food (what behavior is this?)
using two bamboo sticks and putting together to make longer (what behavior is this?)
ducklings following man (what behavior is this?)
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.