The option that CORRECTLY identifies the type of endoskeleton and existence of jaws in a lamprey fish is
Correct answer: A. A. Cartilaginous endoskeleton, no jaws
- A. A. Cartilaginous endoskeleton, no jaws
- B. B. Bony endoskeleton, jaws present
- C. C. Cartilaginous endoskeleton, jaws present
- D. D. Bony endoskeleton, no jaws
Explanation
Lampreys are a type of jawless fish known as agnathans. They have a cartilaginous endoskeleton, meaning their internal skeleton is made of cartilage rather than bone. Additionally, lampreys lack true jaws, a feature that distinguishes them from more advanced vertebrates known as gnathostomes, which have jaws. Therefore, the correct identification of a lamprey's endoskeleton and jaw presence is that they have a cartilaginous endoskeleton and no jaws.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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