Question

What are the group names of the following categories of animals?
A. Animals with a backbone….
B. Animals with hairy skin….
C. Animals with three pairs of legs….
D. Animals with feathers….

Answer 1

Phylum Chordata includes subphylum Vertebrata which have a backbone. Vertebrata include Mammals and Aves which have characteristic features of hair and feather respectively.

Complete answer:
A. Animals with a backbone - Vertebrates
Vertebrate, also known as Craniata, is a subphylum in the phylum Chordata. They are animals that have a backbone and a skeleton. They have a spinal cord surrounded by cartilage or bone. They are characterised by a muscular system and a central nervous system enclosed within the backbone. They include fish, amphibians, birds, reptiles and mammals.

B. Animals with a hairy skin – Mammals
Mammals belong to the subphylum vertebrata constituting the class Mammalia. The characteristic features of this class of animals include presence of mammary glands in females, a neocortex, fur or hair on the body and presence of three bones in the middle ear. The mammary glands produce milk which provide nourishment to the young ones. Example- humans, dogs, bears etc.

C. Animals with three pairs of legs - Insects
Class Insecta belongs to phylum Arthropoda which is the largest phylum in the animal kingdom. They consist of a segmented body (divided into three regions i.e., head, thorax and abdomen), three pairs of legs, one pair of antennae and wings (mostly).

D. Animals with feathers – Aves
Class Aves is a group of warm-blooded vertebrates which belong to phylum Chordata. The characteristic features of this class include feathers, four chambered hearts, toothless beaked jaws, strong and light skeletal structure, high metabolic rate and lays hard-shelled eggs.

Note:

Hair is a typical mammalian feature, although whales are an exception.
Other Arthropoda classes have more than three pairs of legs and only one or two body segments.