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Questions and Answers
What is the characteristic tail fin of Chondrichthyes?
What is the characteristic tail fin of Chondrichthyes?
- Heterocercal tail fin (correct)
- Protocercal tail fin
- Diphycercal tail fin
- Homocercal tail fin
What type of heart do Chondrichthyes have?
What type of heart do Chondrichthyes have?
- Three chambered heart
- Five chambered heart
- Two chambered heart (correct)
- Four chambered heart
What is the composition of the internal skeleton of Chondrichthyes?
What is the composition of the internal skeleton of Chondrichthyes?
- Cartilage and connective tissue (correct)
- Connective tissue and muscle
- Cartilage and muscle
- Bone and cartilage
What is the reproductive feature unique to male Chondrichthyes?
What is the reproductive feature unique to male Chondrichthyes?
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What do Chondrichthyes lack, which is present in some other fish?
What do Chondrichthyes lack, which is present in some other fish?
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Study Notes
Characteristics of Chondrichthyes
- The characteristic tail fin of Chondrichthyes is heterocercal, meaning the upper lobe is longer than the lower lobe.
- Chondrichthyes have a two-chambered heart, consisting of one atrium and one ventricle.
- The internal skeleton of Chondrichthyes is composed of cartilage, rather than bone.
- Male Chondrichthyes have a unique reproductive feature, the clasper, a modification of the pelvic fins used for fertilization.
- Chondrichthyes lack a swim bladder, a gas-filled organ that provides buoyancy in other fish.
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Description
Test your knowledge of vertebrates with jaws derived from the mandibular arch in this quiz. Explore the characteristics of Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, and Mammalia, including their unique skeletal composition, mouth structure, skin features, heart anatomy, and tail design.
