Question

part ii: true or false: correct all false statements
a) urochordata include the hagfish and lampreys. f____
urochordata include tunicates not hagfish and lampreys
b) lancelets are aquatic gill breathing simple vertebrates. f_
they are not vertebrates
c) the agnathans are known as jawless fish. t_

d) sharks and rays have bony skeletons. f___

Explanation:

a) Urochordata (tunicates) are distinct from hagfish/lampreys (Agnatha). Corrected statement provided.
b) Lancelets are cephalochordates, invertebrate chordates, not vertebrates. Corrected statement provided.
c) Agnathans are defined as jawless fish, so this is true.
d) Sharks and rays are cartilaginous fish, with skeletons made of cartilage, not bone.

Answer:

a) False. Urochordata include tunicates not hagfish and lampreys.
b) False. They are not vertebrates.
c) True.
d) False. Sharks and rays have cartilaginous skeletons, not bony skeletons.