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Questions and Answers
What is the backbone-like structure in marine organisms with a backbone?
What is the backbone-like structure in marine organisms with a backbone?
- Spinal cord
- Endoskeleton
- Notochord (correct)
- Pharyngeal slits
Which class of fish has non-replaceable placoid scales?
Which class of fish has non-replaceable placoid scales?
- Cartilaginous fish (Chondrichthyes) (correct)
- Bony fish (Osteichthyes)
- Lobe-finned fish (Sarcopterygii)
- Jawless fish (Agnatha)
Which subclass of cartilaginous fish includes rays, skates, and sharks?
Which subclass of cartilaginous fish includes rays, skates, and sharks?
- Chimaeriformes
- Elasmobranchii (correct)
- Selachimorpha
- Holocephali
Which marine organisms are chordates but do not have a backbone?
Which marine organisms are chordates but do not have a backbone?
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What is the feeding mechanism of jawless fish (Agnatha)?
What is the feeding mechanism of jawless fish (Agnatha)?
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