hello and welcome Master teacher making bio learning very very simplified just for all of you guys so we have ivat instant vedantu scholarship admission test happening in offline centers near you mad Chen so we offer courses for 8 to 12 Foundation course J course neat course okay you can Avail up to 70% scholarship offline exam why are you guys still waiting please do go and register yourself okay you can take test online also but you also get a free oneon-one counseling with our experts so please do block your slots now let's get into today's video ma'am anom chapter okay let's get into the session millions of species of animals are there correct they're classified based on something right whether they heror Carnivor omn okay cellular level tissue level body symmetry they are called as basis of classification pangla okay so how are organisms classified based on a particular character organisms are classified okay remember that it's very very important organisms are classified based on the arrangement of cells cells arrange of organization cellular level tissue level organization organ level organ system body symmetry how is the body symmetry how is the body able to divide okay then nature of the body cavity information pattern of digestive system circulatory system reproductive system these are all some of the basis of classification pangla the basis of classification let's talk about levels of organization level of organization are there cells are there tissues or are they organ or organ system [Music] okay cellular level of organization I think all of you know cells combined to form tissues so if the tissues are performing function we call it as tissue level of organization if the organs are performing function we call it as organ level of organization okay or system per system level of organization okay cellular level sponges tissue level cant trates organ level platy elementus organ system level anals orthopod molesa aino and Cates okay now let's move on to this symmetry symmetry asymmetrical okay radial symmetry orm I can divide into equal half along radi who is exhibiting radial symmetry C tra and force okay Bilal symmetry Bilal symmetry best example I can cut the body into two equal halves correct along a single plane along the central plane other okay this is what symmetry I was talking about radial symmetry bilateral symmetry okay now let's continue c c it's a body cavity between the body wall and the gut wall so imagine gut imagine body imag so this is gut this is body wall okay and the space between the gut and the body okay organms we call it as a body cavi absent like your plat hel pomate pom false body cavity organism which have false body cavity are called pseudo mism is present as scattered PCH I have pictures I will show you please wait example ask element they have a true body cavity that is from to we call them as okay Cate pomate okay a this is Cate okay these are a body cavity here you can see the Pudo where the where the mism is present in pouches okay now let's continue it's a neat question identify the characteristic of Cate character that is absence of misom absence of brain celon that is incompletely lined with the meod solid body cavity L without solid body C body without a cavity surrounding the internal organ the answer is this there is a body cavity a okay emic layers lay Ecto okay mism and endoderm okay it is the outer Ecto middle mism and the inner endoderm ma'am germ layers ma'am these are the layers which are produced in the embryonic stage Pang okay these layers are the one which are going to give rise to my entire body parts okay so organm diploblastic triploblastic diploblastic now they have two germinal layer that is your ectm and endoderm Mis okay no mism they do not have mism whereas in your triploblastic they have three germinal layer they have an ectoderm endoderm and mism example okay I hope embryonic layer is clear okay diploblastic e they have ectoderm endoderm and mism very very very important yes circulatory system circul open Circ system the BL is pumped by the heart into the body cavity okay the blood vessels structures where do you see open C open circulatory system you see it in orthopod okay orop open circulatory system where do you see closed circulatory system you see it in Cates all Cates have closed circulatory system You' seen analyss earthworms earth worms it is your C it is your closed circulatory system okay remember every every line is very very important what is closed the blood is pumped into blood vessels okay and the blood vessels take the blood to the respective organs segmentation segmentation division okay the body is segmented the body is divided with serial reputation of at least some organs so in the segmentation met merism so wrong we call it as metamerism that is what we call it as true segmentation okay where do you see metamerism you see it in analy okay especially earthworm all these could be an McQ type question in your exam okay in earthworm the body shows a pattern called metameric segmentation the body is internally and externally divided metamerism segmented yes notot this is very very important notot is miso dermally derived miso structure okay form on the dorsal site during the embryonic development develop okay so based on the not organisms are classified as corat and nonat Cates are those animals with no tood non- orates are those animals with without Noto Cod so remember it's very very very important okay next p how is this nonat classified okay en animal kdom nidora PL asement anal orop M they come under invertebrates okay invertebrates or we also call it as nonat okay okay then you have that comes under your separate questions will be asked general characteristics of pH examples very important examples are so let's talk about this how are the organisms classified Kingdom Ania I think all of you know the five kingdom Plante Animalia fungi protesta and you have your Monera correct so you have two levels of organization cellular level okay tissue level organization or organ system level radial symmetry based bilateral okay Bilal without body cavity platus witho it is Asus orop okay let's continue now porer the word they have holes okay they have holes on their body small small holes we call those holes as AA they're commonly called as sponges okay they're generally Mar mostly asymmetric div they are primitive multicellular the first formed multicell they have a cellular level of organization example cyon usia sponga s e s or S square e okay cyon sponga and us spongia very very important system Thea okay the water enters through CC the water is going to carry the food okay the water is going to carry the oxygen that is required by the organism okay so that is ulum okay so water enters through ostria and water leaves through osculum so when the water leaves it will carry all the excretory waste undigested food okay respiratory waste and osculum is very very important and the central cavity SP okay so the cavity which is present here is called as spongo pangla and this entire spongo is lined by specialized cells and the cells ques we call it as quoyes very very very important okay so this and also skeletal system they have specialized endoskeleton called spicules okay these spicules are made up of silica like material they going to provide a framework to the organism so okay so you see osta you see osculum and you can see the entire spongo is lined by quano sites okay and you can see spicules spicules quanite osta osculum the spongo which is a central cavity so water canal system okay water vascular system water can systes cells line the spongo seal and the canals they're going to line the entire spongo seal remember it's very very very important okayer characters digestion is intracellular digestion happens within the cell okay the body supported by skeleton made up of spicules or sponging fiber so they can ask you presence of spcu is a characteristic of Dash porifera Sexes are not separate they are heroides okay Sexes are united both male and Fe female reproductive structure are present in the same organism sponges reproduced asexually by fragmentation and sexually by the formation of gamuts okay then fertilization is internal internal now happens inside the body takes place inside the body okay happens inside the body and development is indirect one is direct development indirect development okay direct no laral stage like human beings we don't have larel stage and all okay indirect means they include larel stages like your frog okay very very important next examples pour all your sites porifera sponga us spongia cyon okay this is all about your porifera pasanga freshwater sponge sponga us spongia and syon so beautiful organisms they are okay this is your ncrt line by line which we have already discussed I'm already the panito okay next these are the ncrt picture one question in case of poherence the spongo is lined with flated cells you have cells called ques okay okay yes body having meshwork of cells internal cavities lined with food filtering cell and in direct development are the characteristic of phm porifera okay yeah we also [Music] call or free swimming they're attached to a substratum they're attached okay free swimming they can swim aquatic mostly Marine radially symmetrical asymmetrical cant radially symmetrical they show tissue level of organization they are di that is called Neo blast they contain stinging capsule called Ney tentacles tentacles blast and Blast has stinging cells okay the name nidaria is derived from the stinging cells in the body called Neo blast or Nido sites okay so you have this jellyfish jellyfish is a very good example for Fen and corals okay po form know one the Medusa form okay there are two forms of cant tra pop and Medusa okay so pop is it is like this Medusa is the other way around okay we'll try to understand this needo blast of function in they have Anchorage defense and for capturing the prey Anchorage defense and they also help in capturing of pre they have a central gastrovascular cavity in the central gastrovascular cavity the central gastrovascular cavity is called Centon and that is why the name called C and they have a mouth and the mouth is called as the hypo okay digestion is extracellular and intracellular some of the narian example corals have a skeleton made up of calcium carbonate corals you have brain coral there are lot of corals okay narian exhibit two form one is your PO form other one is your Medusa form form form usually the PO form are attached they're attached to a substratum whereas the Medusa form are free floating they are capable of their own movement okay they attached to a substrate they can ask you in your exam difference between pop and Medusa okay yes cylindrical form like Hydra and adasia Medusa umbrella shape and free swimming like your Orelia or jellyfish okay po Medusa those narian which exist in both the forms okay okay they're able to alternate the generation alternation of generation is called metagenesis metm segmentation alternation of generation po Medusa po Medusa that is what we call it as metagenesis pangla pops produce Medusa asexually and Medusa form pop sexually mati mati okay that's very very important to understand example meandrina brain coral patula Cen adamia C Anon Georg right yes so you have Portuguese man ofu because this gets attached to ships and it causes a lot of problem to people who are traveling in ship okay the Portuguese man of waren yeah example physics objective ad orand adamia Orelia gonia Nidia patula next this is your line by line this is what we discussed so the examples everything that we discussed has been covered here yes this is a diagrammatic view of Nido blast this is the picture which is given in your textbook ncrt pick the most suitable ter terminology to designate the cycle ofia metagenesis alternation of generation metamorphism metagenesis is the right answer okay next let's move on to T group of organism they commonly known as sea Nets or com jellies okay they're exclusively Marine form radially symmetrical so porifera asymmetrical okay cant radially symmetrical diploblastic tissue level of organization okay and one more interesting thing is they can exhibit their own light bioluminesence okay digestion is both extracellular and intracellular Sexes are not separate they are united hop frites reproduction takes place by sexual means fertilization is external with indirect development laral stages okay yeah their body Bears eight external rows of ciated C plates cated plates these cated Co plates help in Locomotion and I just show you this picture you can see the exhibit they have the property of emitting their own light so bioluminous in solome even your jellyfish they can also emit their own light okay so example toop Plana plur brachia example for too for Tana and plur brachia yes this is your ncrt line by line easy okay radially symmetrical C plates bioluminesence indirect development plob brachia and tolana examples yeah this is the picture that's given plob brachia okay we have a question in Tora fertilization is Dash with Dash development so fertilization exop indirect development next hel helus means worm like okay so they are dorso Vally flattened vent dorsal side both dorsally and vent they are flattened that is why we call them as flat worms okay they are Endo parasites they live inside the body of the host okay they're usually parasitic except plania form they're bilaterally symmetrical organm liver fluke okay this organism can be divided into two equal Hales we call it as bilaterally symmetrical so plement bilaterally symmetrical okay we shall continue triplas [Music] aan organ level of organization Hooks and suckers are present in the parasitic form Hooks and suckers hooks will help in attaching to the body surface okay body suckers is going to help in sucking the nutrition okay it is going to help in sucking the nutrition yeah nutrients from the host directly goes to the body surface the flame cells information the flame cells we call it as proton neia okay proton neia or flame cells proton neia or flame cells helps in excretion excretion Sexes are not separate they are united they are hermo frites fertilization is internal development is through many laral stages it is called indirect development okay then planaria poses High regeneration capacity regener will can regenerate example fola okay tenia is your TAP okay plaria is a free living form then have your fola which is your liver fluke okay so this is what they have given in your textbook everything is covered with what we have discussed okay Pam next information you have your tape warm and liver fluke okay in Tora fertilization is Dash with Dash [Music] development okay there is something wrong with the question here fertilization options let's continue now ask element El round worms okay flat worms as is round worms why it's very very important they are circular and cross section hence the name round worms they are free living aquatic terrestrial or parasitic in plants and animals okay they show organ system level of organization okay they show some property called sexual dimorphism what is sexual dimorphism one can differentiate between the male and the female you can see the females are longer the males are shorter and they are bilaterally symmetrical okay next they are triploblastic but they pseudo because their body cavity is not lined completely by misom okay next Elementary Canal is complete complete from mouth to anus okay with a well developed muscular farings they have a muscular fings and excretory tube plat hel what is the excretory organ flame cells excretory tube is the excretory organ which is used to remove the excretory waste through an excretory pole Sexes are separate remember Sexes are separate that is males and females are distinct fertilization is internal and development may be direct or indirect it's going to be very very easy okay example ascaris round worm vieria it is a filarial worm which causes filariasis then you have ancy we call it as hook worm in the Nam yes this is what we did dious they are dious Sexes are separate okay yeah male and female sexual dimorphism in philm asales often male are longer than female female are longer than male Sexes are not separate they do not show sexual d morphism what is the answer females are longer than males okay just now we discussed now we are moving on to an what are they are segmented worms okay they are also worms their body is highly highly segmented they possess or M character they possess longitudinal and circular muszle which helps in locomotion so the muscles relax contract relax contract and as a result the animal is going to move okay example Earth okay you have your NES you have your leech we call it as hun areia they are all examples for philm Anala okay segment [Music] okay the body is distinctly marked in segments or metam in the segments metam Sol so this is called metamerism okay metamerism is exhibited by analy whereas metagenesis is exhibited by your cant trats okay and they have a locomotory organ they have very very important locomotory organ called parapodia this parapodia is the one which is going to help in swimming swimming help okay clear parapodia is the locomotory organ which is present circulatory system or open circulatory system it is a closed circulatory system okay and then you have your excretory organ that is your neia neia is the excretory organ that helps in osmo regulation and excretion nervous system Dev the neural system consist of paed ganglia okay connected by lateral nerves to a double ventral nerve cord you have lateral nerves okay that is going to be connected to a double vental nerve cord leaches are monious Sexes are united there okay reproduction is sexual NES is an aquatic form which is dious where the Sexes are separate okay shall we continue pangla yes pneumonic NES fima hiia okay no person should exit exam Hall Before Time okay so fresh water anal okay it's very very useful parite Ecto parasite it is going to stay outside the body of the host okay this is what we discussed a lot of information try to process it parapodia neia okay yes this is your Anala and this is your NES okay yeah we have a quick question which of the following is not a characteristic of philom manala sudoo segmentation closed circulatory system ventral nerve cord what is the answer for this they true okay next we'll move on to orthopod it is the largest phm in the animal kingdom which of the following is the largest philm in the animal kingdom it is your orthopod and this entire orthopod is covered by an exoskeleton which is made up of a substance called kiten okay or or jointed okay legs organisms with jointed appendages is what we call it as orthopod pasanga the body is divided into head thorax and abdomen they have jointed appendages the respiratory organs include gills book gills book lungs or traal system circulatory system is of open type remember very very clearly you have lock butterfly scorpion prawn okay okay will be there'll be insects okay you have Crustaceans a lot of things are there when it comes to Insects okay yes let's talk about sensory organs s orans in they have antenna they have ice okay which can be compound or simple eye they have statos which help in balancing okay then you have excretion is by Malian tubules Malian tubules help in excretion and let me revise platy element is the flame cell ask element is the excretory pore and excretory tube ask then Anala you have neia and you have orthopod you have your Malian tubules they are mostly dious pangla Sexes are separate okay fertilization is internal they are mostly OVI Paris development may be direct or indirect okay so remember all these important points economically important insects correct you have and honeybee which is used in the preparation of Honey silk worm which is used in the preparation of silk fiber okay laifer it is used in the preparation of the wax okay vectors insect vectors they carry the disease like your mosquitoes anilus mosquito CX mosquito Adis mosquito then you have your gregarious pest which is Lo and you have a leing fossil lulus the following Tye question okay this is your ncrt line by line everything is clear we did everything here okay examp butterfly okay Scorpion and prawn yeah in phom oropa excretion takes place through EAS question Malian tubules excretion takes place through Malian tubules very easy okay now we'll move on to molesa Mesa meaning soft bed animals soft animals this is the second largest first largest orop second largest Mesa Mesa terrestrial or aquatic on snail okay you have your P your P oyster examples they have an organ system level of organization they are bilaterally symmetrical okay triploblastic Cate common character body is covered by a calar shell and is unsegmented with a distinct head muscular foot and visceral hump okay head thorax abdomen okay you have a head muscular foot and a visceral hump okay and they are also covered by a calcarius shell examples a soft and spongy layer of skin forms a mantle over the visceral hump the space between the hump and the mantle is called the mantle cavity and the cavity cavity this Gill is going to help in respiration okay they have respiratory and excretory function the anterior head region as sensory tentacles can you see here you see sensory tentacles okay the mouth contains a f like rasping or called radular it is a rasping organ it helps in feeding they're usually Di Sexes are separate okay o Paris indirect development they have laral stages larel stages are seen larel stages are present okay next how do you remember this you remember this as Pila okay that is apple snail Pearl Oyster cuttlefish squid Kiton devil fish sea hair and Tusk shell this is how you remember this pangla okay p pisho you have squid then you have Kiton octopus devil fish Appia we call it a SE hair and you have your dentalium which is called as a Tusk shell [Music] okay yes now we shall continue entire ncrt lines okay we have to talk about the gills also gills are also very very important and these examples are quite quite important okay now we shall continue these are the examples you have your PA then this is your octopus okay so next question what is the common name of a devil fish devil fish it is octopus okay yes now let's move on to aino what do you mean by aodm pangla mola soft bed animals aino spiny skinned animals spiny skinned animals these animals have an endoskeleton okay skeleton is made up of calcarius OES bone Mar structure exact they have bone like structures called calar Ole and hence the name aino der all are Mar with organ system level of organization Mar forms okay the adms are radi symmetric but the lar are bilaterally symmetrical adult radial the starfish I can divide the starfish along any radius laral stage is bilaterally symmetrical they are triploblastic they have three germ layers they are seate animals okay example starfish aasis we call it as brittle star okay correct yes digestive system is complete with mouth on the lower side or the ventral side and anus on the upper side the most distinctive feature of a is the presence of water vascular system water vascular system water can system water vascular system what is the function of water vascular system they help in Locomotion they help in capture and transport of food and respiration okay reproduction is sexual fertilization is usually external development is indirect which free swimming larva every every line is so very important okay aasis starfish okay ainus we call it a c Arin aoria it is brittle star okay we have Anton sea and you have your cuum areia we call it a sea cucumber okay next this is your ncrt line by line water vascular system is very very very important okay and they are spiny skinned organism they what is the use of water vascular system or two okay yeah this is your this is your normal starfish and this is your brittle star okay next we have a question which is the most distinctive feature of aod they show water vascular system distinc feature now let's move on to was earlier considered as a subm under pH okay sep because it has characters of both Cates and non- Cates it consists of a small group of worm like organm they show organ system level of organization they triploblastic Cate animals they have a true C they okay yes the body is cylindrical and it's compos OS anterior probos probos and it has a collar neck structure and a long trunk okay so this is what the body is composed of example bossis example bossis circulatory system is open type respiration takes place through Gils excretory organ is your probos gland very very important Sexes are separate fertilization is external development is indirect so example banog glosses Sao glosses in the glosses n you should remember they are hemic cordat okay or worm like structure they are yeah ncrt line by line prosis collar and trunk excretory organ is prosis gland banog glasses and sacog glosses this is your ncrt corner okay yeah you have your probos collar and neck was earlier placed under which of the following film echinoderm amphibia Ceta none where were they plac theyed now we will move on to okay character of important question presence of not solid supporting structure presence of not presence of dorsal Hollow nerve cord okay nerve C okay then fenal gill slits at least in the embryonic stage ma'am when we were in the embryonic stage in the embryonic stage all of us will have a fenial gill slits okay bilaterally symmetrical triploblastic seomate with organ system level of organization they all show organ system level of organization pangla they have a closed circulatory system ventral heart heart is towards the ventral side fishes L you take up to mammals all of us have a vental heart and post anal tail human beings still now we all have a tailbone okay we have all evolved from our ancestors primates correct so these are all some of the characteristics of phm Cates okay so they are classified into subm uro corat sealo and vertebr okay pH Moon but you need to know your Euro data and SE data as well okay Euro something related to the posterior region of the body correct the Noto cord is present only in the laral tail okay example asedia Salpa and dolum okay sealo Corda the notocord extends from head to tail and it is persistent throughout the life sealo sealo means head so you can remember from head to tail okay example bran okay this [Music] but this not is slowly replaced by a veral column in the adults when the not is replaced by vertebral column we call it as a vertebrates okay soat vertebrates difference can we tell all vertebrates are Cates but not all Cates are vertebrates can we tell that absolutely right so what are the characters okay nerve presence of ner cord presence of Noto cord presence of gill slits and presence of a post anal tail these are all some of the characteristic of phm okay sub it is divided into these are all picture they divided into okay Jaws okay then you have they bear Jaws okay call it a cyclostomata okay now this Nat is divided into two uh super classes okay one the fishes in the Tetra so fishes they bear fin okay lious fish they bony fish okay then in Tetra Tetra you have amphibia repia ases and mammals you have four important things there okay so that's very very important yes so first we have Cy stomy circular mouth okay so they have a circular mouth without Jaws fish Mar organism okay there Ecto parasites on some fishes okay they live on some fishes they're parasitic the body is devoid of scales scales they have Gil slits for respiration Gil Gil slits these are your Gil slets which help in respiration Cranium and vertebral column is cartilaginous cartilaginous they are not bony okay then circulation is closed type the heart pumps blood into blood vessels they are Marine but migrate to fresh water for spawning spawning to lay egg okay eging and dies after few days The larva return back to Marine water water after metamorphosis okay very interesting example pison and mixen or Maxine okay and then so we have your fishes spices they're divided into two important groups one is your contractus other one is ticus okay contus in the cartilaginous fish usually Marine ocean water sea water they have a streamlined body streamlined body body why to basically swim against the water currents okay and fresh water so bony fish fresh water okay they have a cartilaginous endoskeleton endoskeleton it is made up of cartilage here how is the endoskeleton it is made up of Bones to question difference between cartilaginous and bony fishes okay five to seven pairs of gilets are separate without operculum thatum is not here okay here they have operum okay Elementary Canal opens into CLA General opening for Reproductive EX and digestive system okay Elementary Canal opens into anus air bladder is AB absent air bladder so they have to continuously swim in order to float okay to avoid sinking and to continuously float they need to constantly swim air bladder is present heart is two chambered poilo heart is two chambered poils what are poils they are cold blooded organism they cannot change their okay body temp with respect to the surrounding environment they cannot maintain a constant internal environment kilms Sol okay heart chambered Sexes are separate males have pelvic fins which bear claspers Sexes are separate okay tough skin with minute ploid scale in the pla scale ID scale types of scales okay the skin is covered with scale internal fertilization external fertilization V Paris Paris V Paris they give direct birth to ones okay these lay eggs electric organ is present okay in torpedo and poison string is present in Trigon they're highly dangerous fishes okay Sexes are separate male have pelvic fins and bare claspers okay here again the Sexes are separate me Sexes are separate okay yes examples okay scoliodon prce shark then in Mar you have hippocampus seah ex FR water okay that's about your fishes Tetra on a glance we will try to do it on a glance okay amphibia reptiles AES mammals habit amphibia they can leave both on land and as well as in water why do these amphibians need water for laying eggs okay for metamorphosis reptiles they're mostly terrestrial okay ases they presence of feathers they're arbori okay mammals terrestrial few can fly like your bat few live in water like your whales okay they are multiple habites limbs two pairs of Limbs for limb and H limb okay limb two pair if present you have snakes they don't have limbs okay then ases the four limb is modified into wings okay here they have two pair of Limbs for limb and H limb how is the skin the skin is moist the frog skin is very very very moist okay okay dry and cornified skin having scales reptiles they're known for that okay skin is dry without glands longes are presence of pneumatic bones okay pneumatic bones they Hollow okay and that's the reason their weight is too less and they can can fly easily it's an adaptation for flight okay skin possesses hairs memory gland is present that's the greatest character of your mammals okay presence of hair and presence of memory glands or distinguishable character respiration gills lungs or skin here it is lungs here it is lungs here it is lungs okay yesi three chamber cold blooded their body temperature keeps changing okay reptiles three chambered except crocodile crocodile chambered heart a and mammals chamber and they are warm blooded okay warmed homeotherms they are homeotherms their body temperature does not change with respect to the surrounding environment okay OV Paris or VV Paris amphibians are o Paris reptiles are o Paris okay ases are also o Paris whereas mammals are VV Paris most of them are Viv Paras Viv Paris they give direct birth to Ang on or they can be egling egling example in platypus and AA they are examples for o Paris mammals okay example frog okay salamander hila chameleon crocodile crocodilus or crocodile n it is your snake Okay Cola Pavo ostrich there your birds yes so examples are given here pangla which is given in your textbook salamander to Rana tigrina it's a common frog hila we call it as tree frog okay so you have your chameleon crocodilus Kone and Naja your turtles they're also reptiles okay AES you have your neophron okay then you have struo then you have your Pavo peacock parrot here you have your mammals okay in the information okay we have some question an important characteristic that Hemi Cates share with Cates is what is the character that Hemi Cates share with your Cate yes it is the fings with Gil if it was a dorsal Tu okay yes yeah okay Pang that's about the entire session we completed up to mammals okay so in the session FM characteristics examples of the FM okay especially inter arthropoda Anala okay vertebrates difference between bony fish and cartilaginous fish questions okay so do stay tuned for more such one shot videos that is going to boost up your exam performance from your NE exam point of view so do stay tuned for more bio learning thank you so much