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Question
Question 6
Explain how animals in Vertebrata are classified into further subgroups.
Explain how animals in Vertebrata are classified into further subgroups.
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Solution
Animals in Vertebrata are classified into five classes:
(i) Class Pisces: This class includes fishes such as Scoliodon, tuna, rohu, shark, etc. These animals live in water. Hence, they have special adaptive features such as a streamlined body, presence of a tail for movement, gills, etc. to survive in water.
(ii) Class Amphibia: It includes frogs, toads, and salamanders. These animals have a dual mode of life- terrestrial and aquatic. In the larval stage, the respiratory organs are gills, but in the adult stage, respiration occurs through the lungs or skin. They lay eggs in water.
(iii) Class Reptilia: It includes reptiles such as lizards, snakes, turtles, etc. They usually creep or crawl on land. The body of a reptile is covered with dry and cornified skin to prevent water loss. They lay eggs on land.
(iv) Class Aves: It includes all birds such as sparrow, pigeon, crow, etc. Most of them have feathers and can fly, though there are some birds that cannot fly. Their forelimbs are modified into wings for flight, while hind limbs are modified for walking and clasping. They lay eggs.
(v) Class Mammalia: It includes a variety of animals which have milk-producing glands, called mammary glands, to nourish their young ones. Some lay eggs and some give birth to young ones. Their skin has hair as well as sweat glands to regulate their body temperature.
(i) Class Pisces: This class includes fishes such as Scoliodon, tuna, rohu, shark, etc. These animals live in water. Hence, they have special adaptive features such as a streamlined body, presence of a tail for movement, gills, etc. to survive in water.
(ii) Class Amphibia: It includes frogs, toads, and salamanders. These animals have a dual mode of life- terrestrial and aquatic. In the larval stage, the respiratory organs are gills, but in the adult stage, respiration occurs through the lungs or skin. They lay eggs in water.
(iii) Class Reptilia: It includes reptiles such as lizards, snakes, turtles, etc. They usually creep or crawl on land. The body of a reptile is covered with dry and cornified skin to prevent water loss. They lay eggs on land.
(iv) Class Aves: It includes all birds such as sparrow, pigeon, crow, etc. Most of them have feathers and can fly, though there are some birds that cannot fly. Their forelimbs are modified into wings for flight, while hind limbs are modified for walking and clasping. They lay eggs.
(v) Class Mammalia: It includes a variety of animals which have milk-producing glands, called mammary glands, to nourish their young ones. Some lay eggs and some give birth to young ones. Their skin has hair as well as sweat glands to regulate their body temperature.
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