why amphibians are unsucessful vertebrates on land give any 2 reasons
Answers
Answered by
1
amphibians are consider as a unsuccessful land vertebrates since they could not completely get independent of water.
they need water for egg lying and water plays crucial/lead role in their fertilization process.
besides this their eggs can get dehydrated completely if not kept in water due to absence of protective covering.
even their larvae respire through gills at their early stages of growth.
they have skin as one of their respiratory organ which exchanges gases through simple diffusion. we are well aware of the fact that moist surfaces are a must for diffusion to occur; and this fact brings us to another point which tells how they are dependent on water.
they need water for egg lying and water plays crucial/lead role in their fertilization process.
besides this their eggs can get dehydrated completely if not kept in water due to absence of protective covering.
even their larvae respire through gills at their early stages of growth.
they have skin as one of their respiratory organ which exchanges gases through simple diffusion. we are well aware of the fact that moist surfaces are a must for diffusion to occur; and this fact brings us to another point which tells how they are dependent on water.
Answered by
1
┏─━─━─━─━∞◆∞━─━─━─━─┓
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
▶Amphibians are unsucessful vertebrates on land because:-
[1] They need water for egg lying.
[2] They are cold blooded so they cannot regulate temperature.
Vertebrate➫ The chordates that possess a backbone are called vertebrates.
► It is also a Subphylum Vertebrate.
➧ Characteristics are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❱ Body is bilaterally symmetrical.
❱ Body wall is triploblastic.
❱ Complex differentiation of body tissues & organs
❱ Notochord is present in the Embryo.
❱ nerve cord is divided into brain & spinal cord.
❱ Brain is enclosed in a brain box.
❱ Body is divided into head Thorax & abdomen.
❱ Body has two pairs of fins or names.
❱ Gills either present throughout life or by lungs.
➧ Subphylum Vertebrate divided into Five Classes:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Class Pisces:-
━━━━━━━━━━━━━━━━━━☟
❱ These are cold blooded.
❱ These are exclusively aquatic invertebrates.
❱ Body is streamlined.
❱ They have one pair of pectoral & pelvic fins.
❱ Respiration by 5 pairs of gills.
❱ Heart is two chambered.
❱ Skin is slimmy & covered with scales.
►Examples:- Electric Rays & DogFish
➧ Types 0f Class Pisces are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
➀❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is ventral.
◉ It is totally marine.
◉ Tail is heterocercal.
◉ Endoskeleton is Cartilaginous.
②❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is trrminal.
◉ It is freshwater.
◉ Tail is homocercal.
◉ Endoskeleton is Bony.
❷❭ Class Amphibia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, trunk & Tail.
❱ Heart is three - Chambers.
❱ Fertilization is external & lay eggs.
❱ Respiration through gills, lungs & skin.
❱ They undergo hibernation & aestivation.
❱ Embryonic membrane is absent.
❱ Skin is a smooth & moist.
►Examples:- Seahorse & Catla
❸❭ Class Reptilia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, neck, trunk and tail.
❱ Heart is incompletely four chambered.
❱ Fertilization is internal.
❱ Respiration through gills.
❱ It is the first Terrestrial vertebrates.
❱ Embryonic membrane is present.
❱ Skin is rough & dry.
►Examples:- Frogs & Toads
❹❭ Class Aves:-
━━━━━━━━━━━━━━━━━━☟
❱ These are warm blooded.
❱ Feathers are present on the body.
❱ Respiration by lungs with air sacs.
❱ Mammary gland is absent.
❱ They are 0viparous. Beek present.
❱ Bones are flight.
❱ Sweat & oil gland is absent.
❱ External ear is absent.
►Examples:- Crows & Parrots
❺❭ Class Mammalia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are also warm blooded.
❱ Body covered with hair.
❱ Respiration by lungs without air sacs.
❱ Mammary gland is present.
❱ Teeth are present.
❱ Sweet and all gland is present.
❱ Solid bones are present.
❱ Heart is four chamber.
❱ External ears are present.
►Examples:- Humans & Rabbits
_________
Thanks...✊
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛
▶Amphibians are unsucessful vertebrates on land because:-
[1] They need water for egg lying.
[2] They are cold blooded so they cannot regulate temperature.
Vertebrate➫ The chordates that possess a backbone are called vertebrates.
► It is also a Subphylum Vertebrate.
➧ Characteristics are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❱ Body is bilaterally symmetrical.
❱ Body wall is triploblastic.
❱ Complex differentiation of body tissues & organs
❱ Notochord is present in the Embryo.
❱ nerve cord is divided into brain & spinal cord.
❱ Brain is enclosed in a brain box.
❱ Body is divided into head Thorax & abdomen.
❱ Body has two pairs of fins or names.
❱ Gills either present throughout life or by lungs.
➧ Subphylum Vertebrate divided into Five Classes:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
❶❭ Class Pisces:-
━━━━━━━━━━━━━━━━━━☟
❱ These are cold blooded.
❱ These are exclusively aquatic invertebrates.
❱ Body is streamlined.
❱ They have one pair of pectoral & pelvic fins.
❱ Respiration by 5 pairs of gills.
❱ Heart is two chambered.
❱ Skin is slimmy & covered with scales.
►Examples:- Electric Rays & DogFish
➧ Types 0f Class Pisces are:-
▬▬▬▬▬▬▬▬▬▬▬▬▬⤵
➀❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is ventral.
◉ It is totally marine.
◉ Tail is heterocercal.
◉ Endoskeleton is Cartilaginous.
②❭ Cartilaginous Fishes:-
━━━━━━━━━━━━━━━━━━☟
◉ Mouth is trrminal.
◉ It is freshwater.
◉ Tail is homocercal.
◉ Endoskeleton is Bony.
❷❭ Class Amphibia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, trunk & Tail.
❱ Heart is three - Chambers.
❱ Fertilization is external & lay eggs.
❱ Respiration through gills, lungs & skin.
❱ They undergo hibernation & aestivation.
❱ Embryonic membrane is absent.
❱ Skin is a smooth & moist.
►Examples:- Seahorse & Catla
❸❭ Class Reptilia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are cold blooded animals.
❱ Body divided into head, neck, trunk and tail.
❱ Heart is incompletely four chambered.
❱ Fertilization is internal.
❱ Respiration through gills.
❱ It is the first Terrestrial vertebrates.
❱ Embryonic membrane is present.
❱ Skin is rough & dry.
►Examples:- Frogs & Toads
❹❭ Class Aves:-
━━━━━━━━━━━━━━━━━━☟
❱ These are warm blooded.
❱ Feathers are present on the body.
❱ Respiration by lungs with air sacs.
❱ Mammary gland is absent.
❱ They are 0viparous. Beek present.
❱ Bones are flight.
❱ Sweat & oil gland is absent.
❱ External ear is absent.
►Examples:- Crows & Parrots
❺❭ Class Mammalia:-
━━━━━━━━━━━━━━━━━━☟
❱ They are also warm blooded.
❱ Body covered with hair.
❱ Respiration by lungs without air sacs.
❱ Mammary gland is present.
❱ Teeth are present.
❱ Sweet and all gland is present.
❱ Solid bones are present.
❱ Heart is four chamber.
❱ External ears are present.
►Examples:- Humans & Rabbits
_________
Thanks...✊
Similar questions