Give examples from the life of plants, animals or humans, confirming the existence of diurnal, seasonal and annual rhythms

• per diem – alternation of wakefulness and sleep, changes in body temperature, heart rate, depth and frequency of respiration in humans. In amoebas, the rate of division changes during the day. In some plants, the opening and closing of flowers, the raising and lowering of leaves, and the maximum intensity of respiration are timed to a certain time.
• seasonal – mating season in animals.
• annual – seasonal changes in the Earth’s vegetation, bird migration, hibernation of a number of animal species.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.