Question

What are the group names of the following categories of animals?
A. Animals with a backbone ______
B. Animals with a hairy skin______
C. Animals with three pairs of legs___
D. Animals with feathers______

Answer 1

A multicellular eukaryotic organism that belongs to the kingdom Animalia is called animal. Animals are also called Metazoan. Different organisms are categorized depending upon the characteristics, structure, and function they exhibit.

Complete answer: A. Kingdom Animalia is one of the three kingdoms and it is further divided into different classes. They are Vermes, Insecta, Amphibia, Aves, and Mammals. Animals with a backbone are called vertebrates. All species of animals that show the presence of a spinal cord surrounded by cartilage are grouped and placed in subphylum vertebrata. Vertebrates are sometimes referred to as chordates. Examples of vertebrates are jawless fish, jawed vertebrates such as cartilaginous fish, tetrapods such as reptiles, birds, amphibians, and mammals. So, animals with a backbone are vertebrates.
B. Hairy skin is a characteristic of mammalia. Groups of animals which are characterized by the presence of mammary glands in females are placed in the mammalia group. This characteristic of mammals makes them different from birds and reptiles. So, animals with hairy skin belong to mammals.
C. The largest group within the phylum arthropoda is insecta. These are hexapod invertebrates. Insects exhibit the presence of more than two or three legs. So, animals with three pairs of legs belong to the class insecta.
D. Warm-blooded vertebrates which belong to the class of aves are known birds. They are characterized by the presence of feathers. The mode of locomotion of most of the aves is flying. They use their feathers to fly. So, animals with feathers are placed in group aves.

Note: Vertebral column is a defining characteristic feature of vertebrates in which the notochord present in phylum Chordata is replaced by a segmented series of stiffer elements that is separated by mobile joints. Gills or lungs are present in vertebrates for the purpose of respiration.