In amphibians, syngamy occurs in the external medium (water) i.e. outside the body of organism while in reptiles, syngamy occurs inside the body of organism.
No, because reptiles and amphibians are two different species of animals. Amphibians are animals like frogs, toads and salamanders. Reptiles are snakes, lizards, turtles,... I think what you really...
No, reptiles are a type of species, as are amphibians. Therefore, a reptile cannot be an amphibian. Another reason is amphibians live in or near water. Reptiles do not.