Studied by 8 peoplewhat are four common characteristics of chordates?
1. Dorsal hollow nerve cord 2. Notochord 3. Gill Slits 4. Post-anal Tail
Chordata have what type of symmetry?
bilateral symmetry
majority of Chordata are…
vertebrates
what are vertebrates?
animals with a backbone
what are some examples of vertebrate Chordata?
fish, amphibians, reptiles, birds
animals with a vertebrate belong to which subphylum?
subphylum Vertebrata
what are the subphyla of Chordata?
vertebrate, tunicate, lancelet, and cephalochordate
what is the still dorsal rod that supports the bodies of Chordata?
the notochord
Chordata have a tail that extends…
beyond the anus(post-anal tail)
what are the seven classes of Chordata?
Cyclostomata, Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, Mammalia
what are tunicates?
a subphylum of Chordata that consists of marine invertebrate animals
how do tunicates survive?
adult tunicates are sessile, so they get their nutrients through filter feeding. they reproduce asexually by budding or sexually because they are hermaphrodites
how many species of Cephalochordates are there?
23 species: the lancelet animal
Cephalochordates are unique because…
they do not have vertebrates
how many subphyla of Chordata are there?
3; Craniata, Tunicata, Cephalochordata
how many classes of Chordata are there?
5 classes
what are the five classes of Chordata?
fish, amphibians, reptiles, mammals, and birds
what is the purpose of the notochord?
it supports and protects the nerve cord
what is the notochord?
a rigid structure that is in front of the nerve cord that appears in embryonic development
what are advantages of having an endoskeleton?
they are more flexible which allows for easier growth, less energy expenditure, can support greater weight
what is an endoskeleton?
an internal support system found in animals that are made of mineralized tissue
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