vertebrates

Question 1

all vertebrates are cordates, but

Answer 1

not all cordates are vertabrates

Question 2

vertebrate types

Answer 2

fish
amphibians

Question 3

all cordates at some point during development have

Answer 3

notochord
dorsal hollow nerve
pharyngeal gill slits
post-anal tail

Question 4

notochord

Answer 4

flexible, rod shaped, in embryonic stage of all chordates, adult stage in some

Question 5

pharyngeal slits

Answer 5

openings in the pharynx
in aquatic environments: allow for the exit of water that enters the mouth during feeting
amphibians, reptiles, birds and mammals: develop into ears and tonsils

Question 6

jawless fish

Answer 6

hagfish and lampreys