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External features
1.The body is divided into head,trunk,tail.with tail being the largest portion of the body.
2.The body is covered by scales & even osteoderms in case of crocodiles,this is a evolutionary change to conserve body fluids like the water from evaporating.
3.All reptiles are slender,with elongated body.
4.They shed their skin in complete or bits.
5.Overlapping scales which eventually become hard .
6.Most of the reptiles slither on ground with 4 limbs belly facing towards the ventral side.
7.Most of the reptiles the brood pouch or the egg fertilization region is present in the preanal segment.
8.Eggs are leathery one of the important feature this is to protect eggs from harsh conditions like fluds too.
9.Reptiles are oviviparus but some of the snakes,few lizards are viviparus.
Internal features
1.Reptile have partial 3 chambered heart with 2 ventricles 1 atria,but crocodiles have 4 chambered heart like the mammals.
2.All reptiles are uricotelic which means they excreat uric acid unlike mammals which excreat urea & called ureotellic.
3.Excreation of uric acid is to minimise the water loss.
What else can I help you with?
Are sharks amphibians mammals or reptiles?
Sharks are not amphibians, mammals, or reptiles. They are a type of fish known as cartilaginous fish, as their skeletons are made of cartilage instead of bone.
What are clams reptiles or amphibians or fish or mammals?
a clam is a crustacean
Why do scientists classify fish amphibians reptilesbirdsand mammals together in one group?
Fish, reptiles, amphibians, birds, and mammals are all vertebrates. They all have a backbone and internal bones.
In what order did the five classes of vertebrates evolve?
The five classes of vertebrates (fish, amphibians, reptiles, birds, mammals) evolved in the following order: fish appeared first, followed by amphibians, then reptiles, birds, and finally mammals. Each class adapted and diversified to exploit different environments and ecological niches over millions of years.
What animal is cold blooded with teeth?
Fish, amphibians, reptiles (not turtles as they don´t have teeth).
What has the most in common birds fish amphibians reptiles and mammals?
reptiles and amphibians have the most in common
Which came first fish or amphibians or reptiles?
Fish, and then amphibians, and then reptiles, and then mammals
What came before the fish amphibians reptiles and dinosaurs?
Fish, reptiles, and amphibians, originated in that order during the Paleozoic era.
Which three vertebrates groups have the same body temperature as their surroundings?
The three Vertebrate groups that have the same temperature as their surroundings are Fish, Reptiles, and Amphibians. That means they are all cold blooded.
Are frogs fish or mammals?
No there is a group call F.A.R (fishes,amphibians, and reptiles). Fishes belong in the fish group and amphibians are double life lives in water and land. Reptiles are Alligators.
Are sharks amphibians mammals or reptiles?
Sharks are not amphibians, mammals, or reptiles. They are a type of fish known as cartilaginous fish, as their skeletons are made of cartilage instead of bone.
Were flying reptiles the first amphibians?
No. Reptiles and amphibians are two different orders and animals and amphibians cam first. Simply put, the first amphibians evolved from fish and the first reptiles evolved from amphibians.
What shows the order in which vertebrates evolved?
1:fish 2: amphibians 3: reptiles 4: birds 5: mammals
What groups of the reptiles amphibians and fish divided in to?
They are all vertebrates, and the reptiles and amphibians belong to the tetrapods because they have four legs.
What is the order which vertebrates evolved?
Fish - amphibians - reptiles; and from the reptiles birds and mammals.
Are turtles amphibians or fish?
All turtles are reptiles.
Is a Platyus a fish amphibians reptiles?
It is actually a mammal.
