To which class of chordates do the following belong? Justify your inclusion into the class by stating any one characteristic feature. Crow, lion, cobra, flying frog, shark, fresh water fish.
Answers
CROW :
Crow belongs to the class Aves of the chordates.
Characters -
1. Feathers are present.
2. They posseses beak and the wings are modification of their forelimbs.
LION :
They belong to the class Mammalia.
Characters -
1. They have mammary glands to feed their young ones.
2. They posseses 2 pair of limbs.
COBRA :
Cobra belongs to the class called Reptilia.
Characters -
1. Their body is covered by scales and skin that is cornified and dry type.
2. In place of ear, tympanum is present.
FLYING FROG :
It belongs to Amphibia class.
Characters -
1. Their body is divided into trunk and a head.
2. Tympanum is present in them.
SHARK :
It belongs to the class known as Chondrichthyes.
Characters -
1. They possesses notochord which stays in their whole life.
2. They have scales calles placoid scales.
FRESH WATER FISH :
They belong to Osteichthyes class.
Characters -
1. Their gills are of 4 pairs and are covered by operculum.
2. They possesses air bladder which helps in buoyancy.