Question

The animal kingdom is full of a rich and diverse group of organisms. Answer the following question using the choices provided. The answer choices may be used once. more than once. or not at all.
This group of animals is composed of organisms that are entirely aquatic and breathe with gills. They possess bony skeletons and breathe using gills.
A) Class Chondrichthyes
B) Class Amphibia
C) Class Reptilia
D) Phylum Echinodermata
E) Class Osteichthyes

Answer 1

Animals (also known as Metazoa) are multicellular eukaryotic organisms that comprise the biological kingdom, i.e., Kingdom Animalia. Animals, with a few exceptions, consume organic material, breathe oxygen, can travel, reproduce sexually, and evolve from a hollow sphere of cells called the blastula during embryonic development.

Complete answer:
A. The marine organisms in the Chondrichthyes class have a cartilaginous exoskeleton and breathe through their lungs.
B. Amphibia are cold-blooded vertebrates with a bony endoskeleton that breathe through their skin, gills, or lungs.
C. Reptilia are species that have an ossified endoskeleton and breathe through their lungs.
D Echinoderms are marine spiny-skinned creatures that breathe through their skin gills.
E. The fishes in the class Osteichthyes have a bony exoskeleton and breathe through their gills.
Osteichthyes are cold-blooded vertebrates that swim with fins and breathe through gills. Bony fishes have many distinguishing characteristics, including a bone skeleton, scales, paired fins, one pair of gill openings, jaws, and paired nostrils.

Note:
Features of Osteichthyes:
1. Skin with mucous glands and dermal scales embedded.
2. Some are missing scales.
3. Fins that are paired.
4. A mouth full of teeth (some toothless).
5. Jaws are present.
6. Respiration is accomplished by the use of gills that are supported by bony gill arches and concealed by an operculum.