Welcome to the NCERT Solutions for Class 9 Science - Chapter Diversity in Living Organisms. This page offers a step-by-step solution to the specific question from Exercise 7, Question 6: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
Explain how animals in Vertebrata are classified into further subgroups.
Animals in Vertebrates are classified into five classes:
(i) Class Pisces: This class includes fish such as Scoliodon, tuna, rohu, shark, etc. These animals mostly live in water. Hence, they have special adaptive features such as a streamlined body, presence of a tail for movement, gills, etc. to live in water.
(ii) Class Amphibia: The amphibians have adopted to live both on land and water. They respire with the help of gills, lungs and through skins. They are cold - blooded animals. They lay eggs and development through larval stages. e.g : Frog, Salamander etc.
(iii) Class Reptilia: The class name refers to their creeping or crawling mode of locomotion. The body of a reptile is covered with dry and cornified skin to prevent water loss . They are cold - blooded animals. They lay eggs on land. e.g : Snakes, Chameleon etc.
(iv) Class Aves: The characteristics features of aves are the presence of feathers. Most of them have feathers. Their forelimbs are modified into wings for flight, while hind limbs have scales modified for walking and clasping. They are warm blooded and lay eggs. e.g : Crow, Pigeon etc.
(v) Class Mammalia: The most unique mammalian characteristic is presence of milk producing glands by which the young ones are nourished. Their skin has hair as well as sweat glands to regulate their body temperature. e.g : Humans, Lions, Dogs etc.
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