Animal classification|Class 10|chapter 6|science 2|state board|in hindi

Subject:
Science

Topic:
Animal classification

Video covered by:
Priyanka prajapati

Thank you🙏
for watching this video😎
Keep supporting💪
Do like👍
Subscribe▶️
Comment❤️

Follow us on
Facebook:

Augustus edu

  / augustus.ed.3  

Like our Facebook page🚩
augustuseducation

  / augustuse.  .

📷INSTAGRAM:
augustuseducation
  / con.  .

🐦TWITTER:
augustuseducation
@pro_Augustusedu
https://twitter.com/pro_Augustusedu?s=08

Give us rating on google
⭐⭐⭐⭐⭐

https://maps.app.goo.gl/5Bw8f3xzbmsyV...

IF YOU WANT ANY OTHER TOPIC THEN COMMENT IN COMMENT SECTION

E-mail :[email protected]
Website: www.augustuseducation.com

we must be looking varieties of animals around us. Some animals are too small whereas some are too big. Some animals are terrestrial where as some are aquatic. Some animals crawl on land, some swim in water whereas some fly in air. Some animals have scales on skin whereas some have feathers or hairs. In this way, there is huge diversity among the animals too. According to recent studies, estimated number of animal species on earth is approximately 7 million. It is impossible to study each and every species.diverslly on piu

However, if groups and sub-groups of animals are formed depending upon the similarities & differences, it will make it very easy to study such vast variety of animals.
Time to time, different scientists have tried to classify the animals. Greek philosopher Aristotle was the first to perform the animal classification. Aristotle classified the animals according to the criteria like body size, habits and habitats. Further, as per the new developments in sciences, references were changed and thereby the criteria of animal classification too. Classification proposed by Aristotle is known as "Artificial method' Besides Aristotle, artificial method of classification was followed by Theophrastus, Pliny, John Ray, Linnaeus, etc. Later on, "Natural system of classification' was followed.HIstory

Natural system of classification was based on various criteria like body organization, types of cells, chromosomes, bio-chemical properties, etc. By the time, system of classification based on evolution was also brought into practice. It was used by Dobzhansky and Meyer. Recently, Carl Woese has also proposed the animal classification
The diversity shown among present day living organisms is an outcome of the past 3.5 billion years of organic evolution. During this time a great number of new species originated and many more became extinct. Science of palaeontology studies evidences of the past life, in the form of fossils. With such a huge repository of organisms, it would be almost impossible to study each and every living form separately at an individual level. So, to study the diversity among living organisms in an effective way, we need to arrange various kinds of organisms in an orderly or systematic manner. The method of arranging organisms into groups or sets on the basis of similarities and differences is called classification. Similarities and differences of organisms show their relationships. In fact, to urderstand the living world, there is no need to know every detail about all living organisms. Studying only a few representatives from each group would give an idea of all the members of that group. We will study this new system of animal classification in brief in this chapter.

At present, according to the five kingdom classification system of Robert Whittaker, all multicellular animals are included in Kingdom: Animalia. This system of classification is based upon some criteria like Body organization, Body symmetry, Body cavity, Germinal layers, Segmentation, etc.
method of animal classification depending upon presence or absence of the notochord the animal kingdom has been divided into two groups- Non-chordates and Chordates. A. Non-Chordates : Characters of non-chordate animals are as follows •Body is not supported by rod-like notochord.
•Pharyngeal gill-slits are absent• Nerve cord, if present. it is on ventral side. It is solid & paired. •Heart if present it is on dorsal side 4.
•Non-chordates are clasified / divided into 9 phyla. Those phyla are- Porifera, Coelentorata / Cnidaria, Platyhelminthes, Nematoda/Aschelminthes, Annelida,Arthropoda, Mollusca, Echinodermata and Hemichordata. Chordates: Characters of chordates are as follows
1. Body is supported by notochord.
2. Pharyngeal gill-slits or lungs are present for respiration.
3. Nerve cord is present on dorsal side of body. It is hollow.
4. Heart is present on ventral side of body.
All chordate animals are grouped together in a single phylum and the name of phylum is same i.e. Phylum- Chordata. This phylum has been divided into three subphyla as- Urochordata, Cephalochordata & Vertebrata. Sub-phylum Vertebrata has，
been further divided into six classes as- Class: Cyclostomata, Class: Pisces, Class: Amphibia, Class: Reptilia,