Features unique to mammals include _____.
What does the term “tetrapod” mean?
What does the term “tetrapod” mean?
A cell membrane is
A cell membrane is
Which of these chordates is not a vertebrate?
Which of these chordates is not a vertebrate?
Tiktaalik is an important fossil because it is a(n)
Tiktaalik is an important fossil because it is a(n)
Match the mammalian group with its description.
Match the mammalian group with its description.
Match the mammalian group with its description.
Match the mammalian group with its description.
The tapeworm is a(n) ______.
The tapeworm is a(n) ______.
Sharks and rays are a type of ________.
Sharks and rays are a type of ________.
A characteristic that is shared by snakes and birds is _____…
A characteristic that is shared by snakes and birds is _______.