Podcast
Questions and Answers
What are the three modern groups of fish?
What are the three modern groups of fish?
- Osteichthyes (correct)
- Agnatha (correct)
- Reptilia
- Chondrichthyes (correct)
Most of the fish species in Wisconsin would be from which class?
Most of the fish species in Wisconsin would be from which class?
Osteichthyes
Place Linnaeus's classification groups in order from largest to smallest.
Place Linnaeus's classification groups in order from largest to smallest.
Kingdom, Phylum, Class, Order, Family, Genus, Species
What are the four things that identify whether something is a chordate or not?
What are the four things that identify whether something is a chordate or not?
Place Linnaeus's classification groups in order from largest to smallest.
Place Linnaeus's classification groups in order from largest to smallest.
What are the four things that identify whether something is a chordate or not?
What are the four things that identify whether something is a chordate or not?
What is taxonomy?
What is taxonomy?
Write your name using scientific naming rules.
Write your name using scientific naming rules.
What are all the classification categories that humans share with sharks?
What are all the classification categories that humans share with sharks?
What are two things that make something an animal?
What are two things that make something an animal?
What is the difference between Chondrichthyes and Osteichthyes?
What is the difference between Chondrichthyes and Osteichthyes?
What is the class with cartilaginous skeletons and no jaws?
What is the class with cartilaginous skeletons and no jaws?
What are all the classification categories that humans share with sharks?
What are all the classification categories that humans share with sharks?
What are two things the first fishes lacked?
What are two things the first fishes lacked?
What are the significant changes that took place from fish to tetrapod? (List five)
What are the significant changes that took place from fish to tetrapod? (List five)
What is the class with cartilaginous skeletons and no jaws?
What is the class with cartilaginous skeletons and no jaws?
Explain one way that we can blame fish for human ailments such as choking, hiccups, hernias, or knee problems.
Explain one way that we can blame fish for human ailments such as choking, hiccups, hernias, or knee problems.
What is the class with cartilaginous skeletons and no jaws?
What is the class with cartilaginous skeletons and no jaws?
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Study Notes
Fish Classification Overview
- Three modern fish groups: Osteichthyes (bony fish), Chondrichthyes (cartilaginous fish), and Agnatha (jawless fish).
- Most fish species in Wisconsin belong to Osteichthyes.
Linnaeus's Classification System
- Classification hierarchy from largest to smallest: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
- Humans and sharks share the following classification categories: Animalia, Chordate, Vertebrata, Gnathostomata.
Characteristics of Chordates
- Four identifying features of chordates: notochord, dorsal hollow nerve cord, pharyngeal slits, and post-anal tail.
Taxonomy and Naming
- Taxonomy is the scientific classification of living organisms.
- Scientific naming rules entail writing the genus first (capitalized) followed by the species (lowercase), e.g., Zion estano.
Distinctions Among Fish Groups
- Osteichthyes have bony skeletons; Chondrichthyes have cartilaginous skeletons.
- Agnatha represents fish with no jaws and a cartilaginous structure.
Evolution of Early Fish
- Early fish lacked paired fins and jaws.
- Significant evolutionary changes from fish to tetrapod included:
- Flattened head shape.
- Transformation of fins into limbs.
- Relocation of eyes to the top of the head.
- Development of neck bones.
- Formation of vertebrae.
Health Issues Linked to Fish Evolution
- Fish evolution has contributed to certain human ailments, such as choking, hiccups, hernias, and knee problems due to anatomical adaptations.
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