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There are some characteristics that are unique to mammals: hair, sweat glands, mammary glands, and the neocortex in the brain; reptiles lack all of those features and have scales in place of hair. Many of them are also poisonous.
On other grounds, most reptiles have a three-chamber heart, except crocodiles, who have a four-chamber heart like all mammals. Also, reptiles are ovoviviparous or aviparous (they lay eggs) unlike mammals, which are viviparous (gives birth to live young). A notable exception in the platypus, who lays eggs but is a mammal (a monotreme to be precise).
Reptiles are ectothermic ("cold-blooded"), unlike endothermic ("warm-blooded")mammals, which means they are dependent on environmental heat sources and have relatively low metabolic rates. Mammals, on the other hand, have fast metabolisms. This means that they use up energy much faster than reptiles and tend to live a shorter life (size for size) and move around much more whereas a reptile will often slows its metabolism and wait for food to come near it instead of the energy-costly mammalian tactic of looking for food. Inly one mammal is poisonous, again its the platypus.
Mammals have the advantage of being able to live in a wider variety of habitats than reptiles due to their warm blood; which means that they can keep themselves at the optimum temperature (as long as food is available) in a wider range of habitats.
Finally mammals are synapsids, while living reptiles are either anapsids or diapsids.
Mammals are endothermic (they produce their own heat), they have hair on their bodies, females produce milk for their babies, they have live birth, breathe through lungs, and most life on land (terrestrial).
Reptiles are ectothermic (they rely on the sun to regulate their body temperature), they lay amniotic eggs (eggs away from water), their skin is scaly & hard, they can be venomous, and most are carnivores.
Also:
Cold-Blooded is not a real thing. Reptiles don't have cold blood they just can't regulate their temperature.
Fun Fact:
Platypus is the only venomous mammal.
What else can I help you with?
How comparative morphology support theory of evolution?
Look to the morphologies of all mammals and see rather easily how closely related they are in comparison to the more distantly related morphologies of all reptiles. Ancestral traits, such as tetropodal arrangement of limbs and then derived differences between mammals and reptiles. Reptiles having scales and mammals having hair.
In what category would amphibians reptiles and mammals be placed?
Amphibians , reptiles , mammals along with birds are included in Tetrapod Vertebrates .
Are the dinosaurs mammals or reptiles?
A reptile is in no way a mammal. A reptile is a vertebrate, but it is completely different from a mammal. It doesn't have hair, it is an ectotherm, and it doesn't feed its young with milk. A mammal has hair at some point in its life, is an endotherm, and feeds it's young with milk.
Why is the pelycosaur a link between mammals and reptiles?
The pelycosaurs are considered a link between mammals and reptiles because they exhibit features of both groups. They share characteristics with early mammals, such as differentiated teeth and possibly some aspects of their skull structure, while also possessing reptilian-like features including sprawling posture and lack of a secondary palate. This combination of traits positions them as transitional forms between the two groups in evolutionary history.
Is the grebes carnivore?
No. Grebes are not mammals - they are birds. The differences between birds and mammals are:Birds have feathers while mammals have fur, hair or skinBirds lay eggs whilst mammals (with the exception of the monotremes) bear live youngBirds do not feed their young on mothers' milk like all mammals do
What similarities exist between mammals and reptiles?
They're both animals on earth
What are the similarities and differences between mammals and repiles?
Similarities: 1. Both breath oxygen 2. Both give birth 3. Both have internal organs (heart, lungs, stomach etc.) Diferences: 1. Since reptiles are cold blooded, they can change their body temperature to keep warm 2. Reptiles lay eggs 3. Mammals have fur (Hair) Reptiles have scales Hope this helped! :)
Why do scientist clasify fish amphibians reptiles birds and mammals together in one group?
to stdy them differently and make charts to show differences and similarities
Are mammals and reptiles similar?
They have some similarities. Both reptiles and mammals are primarily land-dwelling vertebrates, though some species are aquatic.
What is the difference between mammals and reptiles?
reptiles are cold blooded and mammals are warm blooded.
What is the similarities between non-ruminant animals from ruminant animals?
They both have only one stomach, and primarily pertain to the differences in digestive systems between mammals, not avians, reptiles or amphibians. Ruminants have a four-chambered stomach, whereas non-ruminants have a simple stomach.
What makes them be reptil?
The biggest difference between reptiles and mammals is that reptiles lay eggs, and mammals do not.
What are the similarities and differences between a shark and a whale?
There are many similarities and differences between a shark and a whale. The similarities is that have a similar streamlined body structure but the differences are many including sharks are fish while whales are mammals, sharks have a vertical tail structure while whales have a horizontal one among others.
What are the 3 major differences between mammals marsupials and reptiles?
mammals, including marsupials, are warmblooded whereas reptiles are cold-blooded.mammals bear live young (with the exception of the monotremes) whereas most (not all) reptiles lay eggs.mammals have fur, skin or hair, whereas reptiles have scaly skin, but not scales.
How comparative morphology support theory of evolution?
Look to the morphologies of all mammals and see rather easily how closely related they are in comparison to the more distantly related morphologies of all reptiles. Ancestral traits, such as tetropodal arrangement of limbs and then derived differences between mammals and reptiles. Reptiles having scales and mammals having hair.
What are the similarities between mammals and reptiles?
vertebrates(with a backbone) 1. breathe through lungs 2.live on land (most of them>>reptiles) 3.internal fertilization
What are the similarities of human and chicken embryo?
Mammals, birds, and reptiles all derive from a single common ancestor.
