13 Questions
What is the defining characteristic of fish according to the given text?
Gill-bearing animals that lack limbs with digits
Which phyla do vertebrates fall into, according to Cladists?
Chordata
What percentage of fish species belong to rayfinned fish?
95%
Which group do all vertebrates fall into according to the text?
Chordata
What are the key features that all chordates have at some stage in life, according to the text?
Notochord, limbs, digits, and scales
What group did all other tetrapod life evolve from, according to the text?
Lobe finned fish
What is the key characteristic of the Dorsal Nerve cord?
Hollow structure with pairs of nerves branching from it
Which group of non-vertebrate chordates consists of filter feeders with an early free swimming larval stage?
Urochordata (sea squirts, tunicates)
Which group is considered very primitive but has been key in understanding vertebrate evolution?
Cephalochordata
What is the sister group of the tunicata according to the text?
Tetrapods
Which group of fish is represented by a group of small, jawless, armored fish known as ostracoderms?
Placodermi fossils
What characteristic is unclear about the advantage of a hinged jaw in jawed vertebrates?
Combination of factors
Why are fishes considered a paraphyletic group?
"Any clade containing all fish also contains the tetrapods"
Test your knowledge on the key features, taxonomy, and evolution of fish in this session. Learn about the characteristics of fish and their place in the diversity of life. Explore the different types of fish and their evolutionary history.
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