What are the class characteristics for Chondrichthyes?
Species in this class have paired fins, hard scales, a two-chambered heart, and a pair of nostrils. Most species have 5-7 gill slits on each side of their body.
What are 2 main characteristics of the class Chondrichthyes?
General characteristics of Chondrichthyes and Osteichthyes
- They belong to the same phylum Pisces.
- They both have endoskeleton and exoskeleton.
- They can breathe through gills.
- They have jaws and paired appendages.
- They can be oviparous, viviparous, or oviviviparous.
How Chondrichthyes differ from Osteichthyes give any 4 differences?
Chondrichthyes are cartilaginous fish whose endoskeleton is made up of cartilages while endoskeleton of Osteichthyes is made up of bones. The main difference between Chondrichthyes and Osteichthyes is the composition of their endoskeleton and habitat.
What are the evolutionary characteristics of the class Osteichthyes?
Class Osteichthyes includes all bony fishes. Like all fishes, Osteichthyes are cold-blooded vertebrates that breathe through gills and use fins for swimming. Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.
What is the main characteristic that distinguishes Chondrichthyes from Osteichthyes?
The main difference between Chondrichthyes and Osteichthyes is that the Chondrichthyes is the class of bony fish whose endoskeleton is made up of cartilages whereas Osteichthyes is the class of cartilaginous fish whose endoskeleton is made up of bones.
What are three characteristics that separates both classes of Osteichthyes?
Class – Osteichthyes Bony fishes share several distinguishing features: a skeleton of bone, scales, paired fins, one pair of gill openings, jaws, and paired nostrils. Osteichthyes includes the largest number of living species of all scientific classes of vertebrates, more than 28,000 species.