Bio 370 exam 2 questions and
answers rated A+ passed
3 synapomorphies of elasmobranchii's found during Silurian-Devonian periods - correct answer
✔✔ Amphystylic jaws, 3 cussed teeth, placoid scales
What are the features found in elasmobranchii's extant during Carboniferous-Cretaceous? -
correct answer ✔✔ Heterodont dentition, presence of anal fin and basal support structures
Key attributes of squalamorpha - correct answer ✔✔ Well developed spiracle and lacking anal
fun, bottom dwellers
Key attributes of galeomorpha - correct answer ✔✔ No spiracle, anal find, dwelled on warm
and shallow waters
Batoidea - correct answer ✔✔ Includes skates and rays, dorsally flattened elasmobranchs
known for hypotremate
What is the largest class of bony fish - correct answer ✔✔ Osteichthyes
Synapomorphies of ray finned fish - correct answer ✔✔ presence of endochondral bone,
chondocranial fissure, and bone in fin webs
Paleoniscoids, silurian - correct answer ✔✔ what is the earliest bony fish and which periods was
it extant during
, Lobe-finned fishes, sarcopterygii - correct answer ✔✔ What were known as the transitional
tetropods?
Synapomorphies of osteichthyes - correct answer ✔✔ Large forebrain, jaw modified for suction
feeding, pharyngeal teeth, fins with more purpose
Polypteriformes - correct answer ✔✔ Flaglike dorsal, slow, freshwater and predatory. Heavily
armored, well ossified skeletons
Polypteriformes - correct answer ✔✔ Autapomorphy is a well ossified skeleton
Polypteriformes - correct answer ✔✔ Synapomorphy with actinopterygii is heavily armored
Acipenseriformes - correct answer ✔✔ These were large, active, benthic, had a reduced dermal
skeleton and an elaborate jaw protrusion
Neopterygi - correct answer ✔✔ Includes the orders Lepisosteriformes and Amiiformes
Lepisosteriformes - correct answer ✔✔ Predators found in warm and fresh water, had
elongated bodies, jaws and teeth
Amiiformes - correct answer ✔✔ Found in north america, primitive jaw for suction, had thin
scales
Teleosts - correct answer ✔✔ This class included the orders Elopomorpha, Clupeomorpha,
Euteleostei, and Osteoglossomorpha
Elopomorpha - correct answer ✔✔ This order of teleosts is composed of 90% eels, has
leptocephalus larvae, and are the opposite of anadromous
answers rated A+ passed
3 synapomorphies of elasmobranchii's found during Silurian-Devonian periods - correct answer
✔✔ Amphystylic jaws, 3 cussed teeth, placoid scales
What are the features found in elasmobranchii's extant during Carboniferous-Cretaceous? -
correct answer ✔✔ Heterodont dentition, presence of anal fin and basal support structures
Key attributes of squalamorpha - correct answer ✔✔ Well developed spiracle and lacking anal
fun, bottom dwellers
Key attributes of galeomorpha - correct answer ✔✔ No spiracle, anal find, dwelled on warm
and shallow waters
Batoidea - correct answer ✔✔ Includes skates and rays, dorsally flattened elasmobranchs
known for hypotremate
What is the largest class of bony fish - correct answer ✔✔ Osteichthyes
Synapomorphies of ray finned fish - correct answer ✔✔ presence of endochondral bone,
chondocranial fissure, and bone in fin webs
Paleoniscoids, silurian - correct answer ✔✔ what is the earliest bony fish and which periods was
it extant during
, Lobe-finned fishes, sarcopterygii - correct answer ✔✔ What were known as the transitional
tetropods?
Synapomorphies of osteichthyes - correct answer ✔✔ Large forebrain, jaw modified for suction
feeding, pharyngeal teeth, fins with more purpose
Polypteriformes - correct answer ✔✔ Flaglike dorsal, slow, freshwater and predatory. Heavily
armored, well ossified skeletons
Polypteriformes - correct answer ✔✔ Autapomorphy is a well ossified skeleton
Polypteriformes - correct answer ✔✔ Synapomorphy with actinopterygii is heavily armored
Acipenseriformes - correct answer ✔✔ These were large, active, benthic, had a reduced dermal
skeleton and an elaborate jaw protrusion
Neopterygi - correct answer ✔✔ Includes the orders Lepisosteriformes and Amiiformes
Lepisosteriformes - correct answer ✔✔ Predators found in warm and fresh water, had
elongated bodies, jaws and teeth
Amiiformes - correct answer ✔✔ Found in north america, primitive jaw for suction, had thin
scales
Teleosts - correct answer ✔✔ This class included the orders Elopomorpha, Clupeomorpha,
Euteleostei, and Osteoglossomorpha
Elopomorpha - correct answer ✔✔ This order of teleosts is composed of 90% eels, has
leptocephalus larvae, and are the opposite of anadromous
