15549219
Frage 1
Frage
The two main clades of Osteichthyes are Actinopterygii and Elasmobranchii.
Antworten
- True
- False
Frage 2
Frage
Actinopterygii are [blank_start]ray-finned[blank_end] fishes, and Sarcopterygii are [blank_start]lobe-finned[blank_end] fishes.
Antworten
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ray-finned
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lobe-finned
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ray-finned
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lobe-finned
Frage 3
Frage
Which of these are traits of Osteichthyes?
Antworten
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teeth embedded in dermal margin mouth bones
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teeth connected to mouth bones by collagen
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dermal bones extend into roof of mouth to cover palate
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Gas containing structure used for buoyancy
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Oily liver used for buoyancy
Frage 4
Frage
In Osteichthyes, asymmetrical fin skeleton is an ancestral trait.
Antworten
- True
- False
Frage 5
Frage
Early forms of Osteichthyes had [blank_start]thick[blank_end] scales, while modern Osteichthyes have [blank_start]thin[blank_end] scales
Antworten
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thick
-
thin
-
thick
-
thin
Frage 6
Frage
Actinopterygian scales: [blank_start]enamel[blank_end] ([blank_start]ganoine[blank_end])
Sarcopterygian scales: [blank_start]dentine-like layer[blank_end] ([blank_start]cosmine[blank_end])
Antworten
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enamel
-
ganoine
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dentine-like layer
-
cosmine
Frage 7
Frage
Compare the Skulls of the following:
[blank_start]basal Actinopterygian[blank_end]: complete dermal skull roof and no mobility of upper jaw
[blank_start]Sarcopterygian[blank_end]: complete dermal bone of skull
[blank_start]derived actinopterygian[blank_end]: reduced # dermal bones in skull, greater mobility marginal mouth bones of upper jaw, maxillae and premaxillae
Antworten
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basal Actinopterygian
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Sarcopterygian
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derived actinopterygian
Frage 8
Frage
[blank_start]Actinopterygian[blank_end] brains develop by eversion, folding cerebral hemispheres [blank_start]outward[blank_end].
[blank_start]Sarcopterygian[blank_end] brains develop by cerebral hemispheres folding [blank_start]inward[blank_end] on themselves (as in Humans)
Antworten
-
Actinopterygian
-
Sarcopterygian
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outward
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inward
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Sarcopterygian
-
Actinopterygian
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inward
-
outward
Frage 9
Frage
Early Sarcopterygii were [blank_start]cylindrical[blank_end] and [blank_start]20-70[blank_end] cm long. They had [blank_start]two[blank_end] dorsal fins and a distinct upper lobe on the [blank_start]heterocercal[blank_end] caudal fin. They were most diverse during the [blank_start]Paleozoic[blank_end].
Antworten
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cylindrical
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compressiform
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20-70
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40-90
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10-50
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elongate
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two
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one
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heterocercal
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lunate
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Paleozoic
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Mesozoic
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Cenozoic
Frage 10
Frage
The three major lineages of Sarcopterygii are:
Antworten
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Acinistia
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Dipnoi
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Tetrapodomorpha
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Bodianus
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Cephalopholis
Frage 11
Frage
Actinistia are also known as:
Antworten
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coelacanths
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lungfishes
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four-footed fish
Frage 12
Frage
What are the two derived characters of Actinistia?
Antworten
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dorsal fin that is supported by a plate of bone but lack an internal lob
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symmetrical three-lobed tail with contral fleshy lob that ends in fringe of rays
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Loss of tooth bearing dermal bones
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fin skeleton
Frage 13
Frage
Coelacanths (Actinistia) have a vestigial lung.
Antworten
- True
- False
Frage 14
Frage
What are the derived characters of Dipnoi?
Antworten
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Loss of tooth bearing dermal bones
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Fusion of palatoquadrate to cranium
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teeth scattered over dermal bones
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Symmetrical three-lobed tail with central flesy lob that ends in fringe of rays
Frage 15
Frage
Actinistia is the largest genome among vertebrates.
Antworten
- True
- False
Frage 16
Frage
Dipnoans retained paired lungs.
Antworten
- True
- False
Frage 17
Frage
There is currently one extant species of Tetrapodomorpha fish.
Antworten
- True
- False
Frage 18
Frage
What are the derived characters of Tetrapodomorpha?
Antworten
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Fin skeleton
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Choanae
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fusion of palatoquadrate to cranium
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loss of tooth-bearing dermal bones
Frage 19
Frage
Choanae are...
Antworten
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internal nostrils
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fin skeletons
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retained paired lungs
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fat-filled vestigial lungs
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