The Amniotic Egg
Cuticle.
No. Snakes and other reptiles generally mate and reproduce on land.
Alligators are reptiles. Because they don't require water to reproduce, they are not amphibians.
It was an advantage because reptiles no longer had to stay near bodies of water and could live in more environments than amphibians.
No. Reptiles commonly reporduce on land.
Adaptation
Salamanders and newts are not reptiles because they reproduce by laying eggs in water and are aquatic for part of their life cycle. They are amphibians like frogs and toads.
many desert plants like the barrel cactus , supply water with its leaves, specific "barrel" shape, etc which will let it thrive on its water that it stored
Early land animals had to return to the water to reproduce.
Reptiles are better suited for dry climates. Amphibians must always be moist, and in order to reproduce, they must have access to water.
The amniotic egg allows reptiles to reproduce on land, away from water.
One benefit is that reptiles have water tight skin, which gives them the ability to live far away from water without worrying about drying out.