Question

Explain how Animals in vertebrata are classified into further subgroups ? discuss any subgroup in detail​

Answer 1

Answer:

Animals in Vertebrata 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: It includes frogs, toads, and salamanders. These animals have a dual mode of life. 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. 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 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.

These animals have a dual mode of life. 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.

Explanation:

Answer 2

Answer:

vertebrata group is divide into two subgroup on the basis of having jaws or without jaws

then the the subgroup of vertebrata having jaws is divided into two subgroups based of having fins or have limbs

vertebrata:

without jaws

1. cyclostome

with jaws

• bearing fins

1. Chondrichthyes
2. osteichtyes

• bearing limbs

1. amphibia
2. reptila
3. aves
4. Mammalia