We will study about four animals to understand the adaptive features. We have taken earthworm, cockroach, fish and pigeon which is an example of bird. To begin with, let's take earthworm which belongs to phylum anelida. The specific feature of phylum anelida consists of annular metamiric segments. The fourth, 14th and the 17th segment merge to form the plytillum. Antimiric amelida is true nephriedia. Habitat of earthworm is moist soil. It is an hermaphrodite. In the same organism, you find the male and female reproductive organs. Earthworm is a very useful animal. It is known as the friend of a farmer. It burrows into the moist soil, makes its soft, increases the fertility of the soil and enhances agriculture. Earthworm belongs to phylum anelida and other examples are leech and neerus. The second example that we are taking into consideration is cockroach which belongs to phylum atropoda and class insecta. It is characterized by jointed feet and the segmented body. The body of a cockroach is divided into head, thorax and abdomen. It is covered by caitinous appendages. Circulatory system is open. These are separate. It is an oviparas which means it is egg laying. It is again a nocturnal animal. It is active during the night. Other example of phylum atropoda and class insecta include honeybee and mosquito. The third example that we are taking into consideration is a bony fish. A bony fish is characterized by a streamlined body. Fishes have streamlined body to offer least resistance when they are moving in water. They have specific features like gills which are covered by opa chulem which helps in respiration. Fins that help it to move in water. Scales that protect the body from entry and exit of water. It may have a terminal or a ventral mouth. Fishes may be cartilaginous or bony depending upon the skeleton. Fishing of bony fish is labio. An example of cartilaginous fish is colodon. Fourth example that we are taking into consideration is bird that belongs to phylum cordata and class avis. The jaws are modified into beak. The shape of the body is boat shaped. Four limbs are modified into wings. Bones are pneumatic which means it has got air spaces and makes the body lighter to fly in the air. Other examples of birds are peacock and parrot. They are important for dispersal of seed and form a major link in the food cycle. After observing all the features of these animals you may now learn to draw and highlight the features.