What is a flexible rod that extends along the length of a chordate's back and that is replaced by the backbone in vertebrate development?Multiple choice question.notochordmantlecraniumring canal

Chordates have a Blank______ that develops down the length of an embryo that allows for muscle attachment.Multiple choice question.flexible rodbackbonenotochord

What did the attachment of muscles to the rod that runs along the back of a chordate allow the animals improve?Multiple choice question.Consistency of body temperatureCirculationLocomotion

In chordates called vertebrates, the notochord is replaced by the ______ during development.Multiple choice question.spinal cordbackbonelong nerves of the back and legscranium

Found in chordates, the notochord is aMultiple choice question.ventral nerve cord.dorsal nerve cord.ventral supporting rod.dorsal supporting rod

Chordates that have jaws, vertebrae, gills, and fins are calledMultiple choice question.hagfishes.lancelets.fishes.lampreys.