Chapter 19A Vertebrates Review Jariel Exam 3

In terrestrial vertebrates such as humans from what structure is the auditory tubes, the tonsil, the thymus gland, and the parathyroids originate?

Primitive gut

Sometime in their life members of the chordates (Phylum Chordata) have a _______

Dorsal

Hollow Nerve Cord

A notochord

Pharyngeal Slits

a Muscular post anal tail

From what structure the backbone originates in vertebrates' chordates?

Notochord

Based on the phylogenetic tree of chordates identify the two invertebrate chordates

Tunicate and Lancelets

Which are the two earliest groups of vertebrates?

Hagfish and Lampreys

How and where do the jaws of vertebrates originate?

They originate from the skeletal rods that protect the gill slits.

Enumerate and characterize the three lineages of jawed fishes?

Chondrichthyans: sharks and rays, have a flexible skeleton made primarily of cartilage

Ray finned fishes: for example, tuna, trout, and goldfish have a skeleton made of bone and

Lobe Finned Fishes: coelacanths and lung fishes have a series of rod-shaped bones in their muscular pectoral and pelvic fins.

From what structure the swim bladder originates or evolves?

They originate from the skeletal rods that protect the gill slits. A line of lobe finned fishes give rise to tetrapods.