YKS 2025 · Soru 80

(I) Humans are not the only animals to regulate their sleep-wake cycle over a 24-hour period. (II) Many other species do this too, concentrating their peak activity at different times during the day for survival. (III) However, some animals focus their efforts at dawn and dusk, which are called 'crepuscular' habits, or solely during the night, as seen in 'nocturnal' creatures. (IV) These activity patterns are usually found alongside a host of physiological adaptations, such as better hearing, larger eyes, and enhanced night vision. (V) Being nocturnal, on the other hand, can help an animal avoid predation, find food, or even simply escape the midday heat.