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

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.

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

Which of the following traits are characteristic of all mammals?A.The mother feeds her young with her own milk.B.They walk on two limbs.C.They lay eggs that develop outside the mother's body.D.They breathe through gills.

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.

An animal that has these four basic characteristics at some stage of development: notochord; dorsal tubular nerve cord; pharyngeal pouches; and a postanal tail, is best characterized as a(n)Multiple choice question.