Asked by Sari & MarMar on Apr 27, 2024
Verified
Four of the five answers below are principal characteristics of all chordates. Select the exception.
A) postanal tail
B) bony vertebra
C) notochord
D) dorsal nerve cord
E) pharyngeal gill slits
Bony Vertebra
Structural elements forming the vertebral column in vertebrates, characterized by a more robust and ossified frame compared to cartilaginous or other types.
Chordates
A large phylum of animals that share a common feature of having at some stage in their life a notochord, a dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail.
Notochord
A flexible, rod-shaped support element found in all embryonic and some adult chordate animals, functioning as a primary axial skeleton.
- Acquire knowledge on the development and traits of chordates through evolutionary history.
Verified Answer
QB
Quahty BonitaApr 27, 2024
Final Answer :
B
Explanation :
While all chordates possess a postanal tail, notochord, dorsal nerve cord, and pharyngeal gill slits at some point in their development, not all chordates have bony vertebrae. In fact, only the subphylum Vertebrata (which includes animals like fish, amphibians, reptiles, birds, and mammals) have bony vertebrae.
Learning Objectives
- Acquire knowledge on the development and traits of chordates through evolutionary history.