Ben's Vertebrates Questions

Which of the following is a craniate superclass with living (extant) representatives?

Petromyzontomorphi

Which of the following is the class of jawed fishes (gnathostomes) that contains the  greatest diversity of living fishes?

Actinopterygii

Which of the following are chondrichthyan subclasses?

Elasmobranchii, Holocephali

Which of the following is a neopterygian fish that is not a teleost (division Teleostei)?

Gars

According to Rybczynski et al (2009), the fossil of the mammal Puijila darwini represented a transitional form between aquatic and land-based taxa, and is significant because it suggests that:

All three pinniped families can be united by a common ancester (monophyly).

While diving in a freshwater lake, you see a jawless fish with 7 gill-openings and well developed eyes. To what superclass is this fish most likely to belong?

Petromyzontomorphi

Which of the following statements about Ostariophysi (superorder; includes minnows, catfishes, carps etc) is FALSE?

They are in the same subdivision as the bonytongues, elephantfishes and gymnarchids

While on a research cruise, you see a large marine mammal on the shore. You notice that it rotates its pelvis while walking but does not have any external ear flaps. To which group of marine mammals does it belong?

Odobenidae

Which of the following is NOT an adaptation that allows the respiratory system of birds to meet high metabolic demands?

Cross-current flow of air and blood