c) Physiological adaptations These are adaptations of organisms that help them to live and survive in their environment with unique niches. Example: Lions have sharp canines to hunt and tear meat and a digestive system suitable for digesting raw meat. The two most well-known physiological adaptations are hibernation and aestivation . These are two different types of inactivity where the metabolic rate slows down so much that the animal can survive without eating or drinking.
Aquatic medium and terrestrial habitats have their own respective environmental conditions. Hence organisms have to evolve appropriate adaptations to select suitable habitats and niches.