As members of the class of animals called vertebrates, humans have which characteristics?Multiple select question.They have jointed appendages.They have a skeleton.They have an internal vertebral column.They have an open circulatory system.Cells have cell walls.

When comparing the vertebral column of mammals with that of reptiles, what two traits unique to mammals are apparent?Multiple select question.vertebral column is straightvertebral column is arched or curvedspines of vertebrae project into the internal cavityvertebrae are highly differentiated

Select all that applyWhich characteristics are absent in tunicates and lancelets but are present in vertebrates?Multiple select question.Enclosed dorsal nerve cordThree pairs of well developed sensory organsBrain encased in skullA postanal tail

"Which animal has the following characteristics: bilateral symmetry, developed cephalization,jointed appendages present, vertebrae absent, and 6 legs"Group of answer choicesGrasshopperCrayfishFrogSea Star

Which of the following is a characteristic of all chordates?Group of answer choicesThey all have vertebral columns.They all exhibit radial symmetry.They all have a notochord sometime during the life cycle.They all have an exoskeleton sometime during the life cycle.They all have a pseudocoelom.

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