5 Questions
What is the backbone-like structure in marine organisms with a backbone?
Notochord
Which class of fish has non-replaceable placoid scales?
Cartilaginous fish (Chondrichthyes)
Which subclass of cartilaginous fish includes rays, skates, and sharks?
Elasmobranchii
Which marine organisms are chordates but do not have a backbone?
Sea squirts
What is the feeding mechanism of jawless fish (Agnatha)?
Suction feeding
Test your knowledge of marine vertebrates in the phylum Chordata with this quiz. Explore the unique characteristics of these organisms, including the presence of a nerve chord, gills/pharyngeal slits, notochord, post anal tail, and ventral heart. Learn about fascinating marine creatures like sea squirts and lancelets, which are chordates without a backbone.
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