Class Amphibia
Class Amphibia
Class Amphibia (Greek: amphi:dual , bios-life)
Amphibian means animals which can live in water and on land.
These were the first land vertebrates (animals with backbones) to appear. Their limbs are adapted for walking and leaping. Most of them have two pairs of pentadactyle (with five digits) limbs. Some have fewer digits. Their skin is moist and without scales. They have a three-chambered heart with two auricles and a ventricle. Amphibians breed in water. Fertilization is external. The larvae (tadpoles) are aquatic They breathe through gills and have tails. Tadpoles undergo metamorphosis and change into adults which respire through lungs . The moist skin also helps in respiration.
Examples: Frog (Rana), toad (Bufo), tree frog (Hyla), salamanders (e.g., Triturus), and caecilians (e.g., Ichthyophis). Caecilians are limbless amphibians.
Metamorphosis can be defined as biological process in which _______________ | |||
| Right Option : D | |||
| View Explanation |
An organism with two pairs of petadactyle limbs which are adapted for walking and leaping and can live in water as well as on land belongs to ____________ phylum. | |||
| Right Option : A | |||
| View Explanation | |||
Organisms of ________________class have a three - chambered heart.
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| Right Option : A | |||
| View Explanation | |||
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My experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thUsually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
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Aman Kumar Shrivastava
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Upmanyu Sharma
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
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8thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
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Om Umang
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
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