Vertebrates
How many subgroups is the phylum Chordata divided into?
3
The most primitive fish known are the....
Agnathans
Amphibians are ______ vertebrates
ectotermic
How many lungs do reptiles have?
2
What kind of vertebrates are birds?
Terrestrial endothermic vertebrates
Marine animals that only have a notochord, nerve cord, and tail during their larvae stage?
Urochordates
What fish became extinct?
Placoderms
Most adult amphibians are tetrapods, which means...
they have four legs
Reptiles use sexual reproduction with..
internal fertilisation
Birds have a aerodynamic body known as a
fusiform
The first vertebrates that we know of and that lived 400 million years ago are ......
Ostracoderms
Sharks, chimaeras, and rays belong to what fish group?
Chondrichthyes: cartilagnous fish
Unlike other vertebrates, amphibians undergo _______ to become adults.
Metamorphosis.
True or False...Snakes have limbs.
False
Most birds have their eyes on the sides of their head, in a ______ position
Lateral
The last vertebrates to apear on earth were...
Birds
Bony fish are known as ...
Osteichthyes
Adult amphibians are carnivores, while tadpoles are...
omnivores
What order do alligators belong in?
Crocodilia
What do birds lungs have to help reduce weight and oxegenate the muscles during flight?
Air sacs
Vertebrates have specialised organs to carry out nutrition and.
reproduction
Fish are __________vertebrates covered with scales.
ectothermic
What do amphibians do to survive the cold months?
Amphibians reduce their activity to a minimum.
Bury themselves in mud and spend several months without eating.
What are the main orders of Reptiles?
Chelonia, Squamata, Crocodilia
The upper limbs of birds are called.....
Wings