SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they do not need water to reproduce
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they have four limbs for superior body support and movement
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they have lungs to breathe oxygen
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they have scales to prevent dehydration
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Detailed explanation-1: -Reptiles have two characteristics that distinguish them as true land animals: They show signs of internal fertilization. The embryonic membrane (amnion) surrounds the embryo and provides it with a moist environment during development. As a result, the embryo is no longer dependent on a moist environment.
Detailed explanation-2: -One of the key adaptations that permitted reptiles to live on land was the development of their scaly skin which contains the protein keratin and waxy lipids, reducing water loss from the skin. Due to this occlusive skin, reptiles cannot use their skin for respiration, as do amphibians; all breathe with lungs.
Detailed explanation-3: -With evolution, the Amphibians evolved from the jawless fishes and could survive on land (as they had lungs). Therefore, amphibians are considered the first terrestrial vertebrates.
Detailed explanation-4: -Reptiles evolved in the Carboniferous period during the Paleozoic Era. They were the first true land animals, as amphibians, echinoderms, and insects have also evolved before them, but they do not live entirely on land. Therefore, reptiles are the first truly terrestrial animals.