B exam style question Flashcards
Which of the following is a craniate superclass with 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.
For reference;
Elasmobranchii: subclass
Holocephali: subclass
Selachii: subdivision
Batoidea: subdivision
Neoselachii: division
Which of the following is a neopterygian fish that is not a teleost?
Gars (Lepisosteiformes)
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
False, because bonytongues etc are in Osteoglossomorpha.
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 + blood
Amphipods belong to which of the following classes?
Malacostraca
Blood flows through anatomical features in the body of actinopterygians by which sequence?
Ventricle -> bulbus arteriosus -> body -> gills
Chondrostei (e.g. sturgeons and paddlefish) are…
A subclass within Actinopterygii
Hexactinellida are commonly known as….
Glass sponges
In Ophiuroids, undigested food waste comes out of which of the following locations?
The mouth
In the back of a museum collection you find an unlabelled jar containing a fish specimen. The specimen has claspers, ribs and 5 gill openings. To which SUBCLASS of fish does this species belong?
Elasmobranchii
Sea anemones belong to which of the following taxonomic groups?
Hexacorallia
The corona of rotifers is…
Covered in cilia for feeding
The description of a nostril on the jawbone of the fossil Kenichthys by Zhu and Ahlberg (2004) is significant because
it provides evidence for which key evolutionary step?
Relocation of posterior nostrils to the palate in tetrapodomorphs.
The sessile sea squirt, Ciona intestinalis, would most likely belong to the class?
Ascidiacea
What feature of many ostracoderm fishes suggests that they had a benthic existence?
Hypocercal tails
What is the primary role of the gastropod radula?
Feeding
What is true of Chondrichthyes, Sacropterygii and Actinopterygii?
They are all classes within the superclass Gnathostomata.
What type of symmetry do Echinoderms typically show?
Bilateral symmetry as larvae and radial symmetry as adults.
Which of the following about nematode worms is FALSE?
They are segmented.
Which of the following is NOT an evolutionary trend observed across teleostean phylogeny?
Fusion of the premaxilla with the maxilla in the upper jaw.
Which of the following is TRUE for sharks and rays living in seawater?
The solute concentration of the blood (osmolality) remains slightly higher than ambient water (hyperosmotic).
Which of the following options best describes the body plan of sponges belonging to the class Homoscleromorpha?
Leuconoid
Which SUBDIVISION of teleosts contains the highest number of extant freshwater fish species?
Otocephala
While on a research cruise you see a marine mammal swimming past the boat. You notice that it has a mobile neck, whiskers and no external ear flaps. To which of the following groups can it belong?
Phocidae
