AP BIOLOGY

Detailed explanation-1: -It belongs to the Class Cyclostomata of Phylum Chordata. It is a jawless fish and lays eggs in fresh water.

Detailed explanation-2: -Most species within the phylum Chordata are vertebrates, or animals with backbones (subphylum Vertebrata). Examples of vertebrate chordates include fishes, amphibians, reptiles, birds, and mammals. A modern human-one species of mammal-is a familiar example of a chordate.

Detailed explanation-3: -But these four features are pretty much where the similarities end, because the diversity of chordates is immensely broad. Some lay eggs, while others have live births. Some have skin, others feathers, and still others have scales.

Detailed explanation-4: -Reptiles are animals that have scaly, water-resistant skin, lay shelled eggs and breathe air. They are tetrapods and will have four limbs or else directly descend from a four-limbed ancestor.

Detailed explanation-5: -The glass catfish (Kryptopterus vitreolus) is one of the few chordates with a visible backbone. The spinal cord is housed within its backbone.