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Questions and Answers
What type of skeleton do Osteichthyes have?
What type of skeleton do Osteichthyes have?
- Hydrostatic skeleton
- Cartilaginous skeleton
- Endoskeleton with extensive ossification (correct)
- Exoskeleton made of scales
Which subclass do Osteichthyes belong to?
Which subclass do Osteichthyes belong to?
- Ray-finned fish (Actinopterygians) (correct)
- Jawless fish (Agnathans)
- Cartilaginous fish (Chondrichthyes)
- Lobe-finned fish (Sarcopterygians)
What is the function of the operculum in the respiratory system of osteichthyans?
What is the function of the operculum in the respiratory system of osteichthyans?
- To filter food particles
- To provide a protective cover (correct)
- To assist in reproduction
- To aid in buoyancy
Which type of tail do Osteichthyes have?
Which type of tail do Osteichthyes have?
What is the function of the pectoral fin in some bony fishes?
What is the function of the pectoral fin in some bony fishes?
Flashcards
Osteichthyes Skeleton Type?
Osteichthyes Skeleton Type?
An internal skeleton with significant bone formation.
Osteichthyes Subclass?
Osteichthyes Subclass?
Ray-finned fish
Operculum Function?
Operculum Function?
Protective gill cover in bony fishes.
Osteichthyes Tail Type?
Osteichthyes Tail Type?
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Pectoral Fin Function?
Pectoral Fin Function?
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Study Notes
Osteichthyes Characteristics
- Osteichthyes have a bony skeleton.
- They belong to the subclass Actinopterygii or Sarcopterygii.
- The operculum, a bony flap, protects the gills and helps to regulate the flow of water during respiration.
- Osteichthyes have a homocercal tail, which means it is symmetrical and has the same shape on both sides.
- In some bony fishes, the pectoral fin is modified to perform functions such as crawling, grasping, or even lunging forward.
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