Animals that have ______ are called vertebrates, and those without are called invertebrates.Multiple choice question.deuterostome developmenta dorsal nerve cordnotochordsbackbones

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

A vertebrate is an animal thatMultiple Choicehas a cranium but lacks a vertebral column.does not have a backbone.has a vertebral column.has an incomplete digestive tract.does not have true tissues.

What animals lack a backbone?Multiple choice question.invertebratesmammalsvertebratesarthropods

Which of our 9 groups of animals does NOT contain invertebrates?Group of answer choiceschordatesannelidsmolluscsarthropodsnone of the above

Vertebrates are distinguished by the presence of aMultiple choice question.postanal tail.exoskeleton made of bone.vertebral column, or backbone.dorsal nerve cord.