What are the Characteristics of Class Amphibia

Characteristics of Class Amphibia

 

  1. i) Members of this class are called amphibians.

 

  1. ii) Their bodies are covered with thin and lose skin. This skin is moist and slimy.

 

iii) Small teeth are present in upper jaw, which are used for grasping.

 

  1. iv) Lungs are present, which help it to respire.

 

  1. v) Eggs are laid in water or moist places.

 

  1. vi) These are cold-blooded animals. They cannot maintain their body temperature as per environment.

 

vii) In extreme hot season frog bury itself in the mud and becomes immovable. This process is called estivation.

 

viii) Metamorphosis process is obeyed for reproduction. In which following step are faced: Egg-Lava-Pupa-Adult

 

  1. ix) Their common examples are frog, toad, salamander, newt, and mud

 

 

PUPPY

 

Example (Frog):

 

  1. i) Its scientific name is Rana tigrina.

 

  1. ii) Its skin is moist and slimy.

 

iii) Dorsal body surface is green and ventral side is yellowish.

 

  1. iv) Tow protruding eyes with eyelids are present.

 

  1. v) A protecting transparent membrane is present on eye.

 

  1. vi) Hind limbs are powerful and long which help frog to swim and hop.

 

vii) Smallest frog is found in Brazil. Its size is less than 1 cm.

 

viii) World largest frog was found in South Africa. Its body length is upto 30 cm.

 

Note: When enrolling in the externship, the same rules apply as in the case of full-time education. It is necessary to present a certificate of full secondary or secondary special education, a medical certificate, a copy of the passport. There is no age limit for teaching external. Each university, which has state accreditation or not, has the right to open an external study. However, not all universities do this. Another distinguishing feature is that you can be listed in one university, and you can pass the final certification (only in your own specialty) in another. Teaching by external means.  As with any business, teaching externally has its pros and cons. The pluses are: more free time; absence of additional costs (for travel, food in the walls of the university, student activities); the opportunity to learn from your own program; The opportunity to obtain a diploma earlier than the standard curriculum assumes.

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