32. Vertebrates

In which type of chordate is the spinal cord surrounded by a backbone composed of cartilage or bone?

What characteristic do all organisms in the phylum Chordata share?

Which of the following is NOT one of the four key derived characteristics shared by all chordates at some stage of their life cycle?

Which of the following is NOT one of the five key characteristics of chordates?

Vertebrates are distinguished by the possession of which of the following structures?

Which characteristic is absent in tunicates and lancelets but is present in vertebrates?

There is some evidence that pharyngeal slits occur in certain species of echinoderms that appear early in the fossil record. If confirmed, what do these data suggest?a. Echinoderms are chordates.b. Pharyngeal slits were present in the earliest echinoderms and lost later.c. Some lineages of echinoderms are more closely related to chordates than others.d. Pharyngeal slits should not be used as a trait in phylogenetic analysis.

Which of the following is NOT a diagnostic feature of the phylum Chordata?

Which of the following is a characteristic of all chordates at some point during their life cycle?

If an animal has segments, bilateral symmetry, pharyngeal clefts, a post-anal tail, and deuterostomic development, it must be a member of the __________.

A __________ is a chordate but not a vertebrate.

Which of the following chordate characteristics contributes most to the formation of your ears?

Which of the following chordate characteristics contributes most to suspension-feeding devices in many invertebrate chordates?

Which of the following pairs is not a correct match?

Which of the following can be found in vertebrates but not in lancelets and tunicates?