Flashcards in Phylum Chordata Deck (125)
What are the four things required to be a chordate?
Tubular Nerve Core
Notocord providing nerve core support
Pharyngeal gill pouches
Post anal tail
What does Ontogeny recapitulates phylogeny during embryonic development mean?
Means through development, we look like the evolutionary development to how we got to be human
What are the 3 SubPhylums of Phylum Chordata?
What makes up Subphylum Urochordata?
Why are Sea Squirts sometimes called Tunicates?
Because they have a cellose tunic or cover
Why are they called Sea Squirts?
Due to filter feeding and squirting water back out
Sea squirt larvae are unique because?
The Larvae has chordate characteristics, but they do not develop into adulthood, so they are considered chordate relative
What makes up Subphlyum Cephalochordata?
Why are they called Lancets?
Because of the shape of the body
What are Lancets gill slits used for?
How do lancets breathe?
O2 is absorbed through skin.
What makes up Subphylum Vertabrae?
over 44,000 Species of Vertabrae
What is a characteristic of Vertabrates?
Endoskeleton w/skull that encases brain
What were Ostraderms?
What is Ichthyology?
Study of fish
Class chondrichthyes are made up of?
The cartilaginous fishes
What are the cartilaginous fishes?
Sharks, Rays, Skates, Fishes
Sharks have a large upper __________ on __________ fin
Sharks have a large upper lobe on caudal fin.
What are dermal denticles?
Sharp scales on skin
How do sharks breathe?
Respire with gills and spiracles.
When hearing the world spiracles, what should you think of?
How many off spring do sharks produce?
Male sharks have?
Claspers used to grab onto female during maiting
Claspers are also found on
What is the World's largest fish?
What is the world's largest fish predator?
Great White Shark
What is the largest ray?
What is a 'rat fish'?
What kind of organism is a chimara?
Transition organism to the bony fish