Osteichthyes (Bony fishes) in detail

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Difference between chondrichthyes and osteichthyes Chondrichthyes 1.includes marine organisms 2. Have cartilaginous endoskeleton. 3. Mouth is present on ventral side. 4.gill slits are separate and not covered by operculum ( Gill cover) . 5. The skin is covered by placoid scales . 6.air / swim bladder is absent due to which they have to swim constantly to avoid sinking. 7. Fertilization is internal . 8.are they are mostly viviparous . 9. ex: scoliodon and pristis. Osteichthyes 1.are ( marine + freshwater ) organisms. 2.have bony endoskeleton. 3.mouth is mostly present on terminal side. 4. Gill slits are covered by operculum 5.The skin is covered by cycloid / ctenoid scales. 6. Presence of air / swim bladder to maintain buoyancy in water. 7. Fertilization is usually external . 8. They are mostly oviparous 9. Ex : catla , hippocampus etc

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Thank u

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very nice explanation sir

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Opisthonerphric kidneys are used for excretion?

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sir evolution k baare mein sochna..mera request hai

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What about the development in chondrichtyes?? Diret or indirect?

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Direct

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Very helpful

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Examples should be added.. otherwise really helpful.. can also add economic importance of each phylum and class. Thanks

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✌️

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Thanks sir

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thankyiu sir

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Sir give us chart of difference between bony & cartilagenous fishes

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Thnku sir

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Thanks bhaiya 😊

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Hlo more videos send.sir or miss. in biology chapte 1st puc student for wait for more videos

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i will see urs video for examples shortcuts but u havent said in this video

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kzbin.info/www/bejne/j2O0gYdjfLGcp7s This is the best video for osteicthyes for better understanding and quick revision 😊❤️

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Thank you sir...I have one question....on this topic...what is buoyancy ? It was mentioned in ncert 11

[@VedPrakash-hz7lr]

Buoyancy means ability to float on water.

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I am Back on track !!😄 Waiting to complete this chapter asap with the help of your videos.

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Thnks bro

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Larval stages may be present in some osteichtyes

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Thank you Bhaiya☺☺☺☺

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Thnx bhai

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Ty u sir

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Sir ..please collaborate with physics wallah -Alak pandey

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Rohu fishes ka detailed lecture dain please jeldi dain mujha chaheyy

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Development Chondrichthyes me kaisa hoga??

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Direct development

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sir type study of scoliodon please

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