4 characterstics features of Earthworm,Bird,Fish,Cockroach
Answers
1. The body is elongated, cylindrical, and metamerically segmented.There are about 100 to 125 segments in the body.
2.A prominent brown - coloured band called clitellum is present in the anterior region of the body covering the segments 14th,15th and 16th.
3. Mouth and anus lie at the opp. ends.
4. Earthworm is a bisexual animal crawling in the soil . It is said to be ' a friend of farmer's.
5. It is used for vermicompost and are therefore important in solid waste management.
2)BIRD :
1. 1.These vertebrates are completely adapted for aerial life.
2.These are warm blooded (Homeotherms) i.e. they can maintain their body temperature constant .
3.Their body is spindle - shaped to minimize air resistance during flight .
4. Forelimbs are modified into wings .Digits are covered with scales and bear claws.
5.Exoskeleton is present in the form of feathers .
6 . Neck is present between head and trunk.
7.Jaws are modified into beak.
3)FISH (ROHU ):
1. Rohu is a fresh water fish having bony skeleton.
2. The body is spindle - shaped with dark or bluish black dorsal side and silvery white ventral and lateral sides.
3.Exoskeleton is of scales.
4.The head is large with terminal mouth
5.Eyes are large , without eyelids.
6.Gills are covered by bony operculum
4) COCKROACH:
1. The body is narrow , bilateral symmetrical and dorsoventrally flattend.
2. The whole body is covered externally by a chitinous cuticle .
3.The body of cockroach is divisible into three parts ,viz., head, thorax, and abdomen.
4. The head on its each side bears a large compound eye and a long , slender , and segmented antenna.
5. Cockroach is a nocturnal pest which is carrier of diseases.
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Structural Characteristics. An earthworm's body is streamlined and every segment contains a number of bristles called setae. The streamlined shape helps the earthworm travel through soil, and the bristles improve grip if the soil is wet. Circular muscles surround every segment of an earthworm's body.
Feathers. Feathers are the defining characteristic of Aves, found on every living species of bird and no other class of animal. ...
Wings. All birds have wings, although not all birds fly. ...
Beak. All birds have beaks, or bills, made of a bony core surrounded by a thin layer of keratin. ...
Eggs. ...
Skeleton.
Unlike mammals, fish are cold-blooded. This means that they do not maintain a constant internal body temperature; instead, their temperature is greatly influenced by their environment. True fish have a backbone and fins. Most also breathe with gills and have scales that cover their bodies.
Cockroaches are generalized insects, with few special adaptations, and may be among the most primitive living neopteran insects. They have a relatively small head and a broad, flattened body, and most species are reddish-brown to dark brown. They have large compound eyes, two ocelli, and long, flexible antennae.