Reptiles are adapted to land by having
Reptiles exhibit terrestrial adaptation principally through keratinized dry epidermis covered with overlapping horny scales or scutes composed of beta-keratin forming impermeable barrier minimizing transepidermal water loss offering mechanical protection against abrasion and predation. Epidermis largely aglandular few scent glands, prevents cutaneous respiration shifting gas exchange entirely to well-developed lungs with internal septation. Shelled amniotic eggs with calcareous shell, internal fertilization using hemipenes or single phallus, metanephric kidney excreting uricotelic wastes reduc
Ref: NCERT Class 11 Chapter 4 Reptilia Adaptations; Campbell Biology 12th ed. Chapter 34 Reptile Integument and Water Economy