Answer: Circadian Rhythms
There are three types of biological rhythms.
→The one that occurs about every day (approx 24 hours) is known as Circadian Rhythms. For example, Hormone secretion, urine production, sleep etc.
→The one that occurs after more than a day like menstrual cycles of women (28 days) is known as Infradian Rhythms.
→The one that occurs more than once a day is known as Ultradian Rhythms like sleep, hormone levels etc.
Therefore, a biological cycle that is approximately 25 hours long is called Circadian Rhythms.