Not only that, even insects without watches know that flowers bloom and fall.

Nature will give you a biological clock! As we all know, roosters crow. In fact, if you pay attention to the biological activities in nature, you will find that nature is a beautiful clock. Look carefully at the time when all kinds of flowers bloom and wither, and you will find that they each have a timetable. Beer flax blooms at about three in the morning and withers at eight or nine. Morning glory turns on its horn at about four o'clock in the morning and turns it off at noon. At five o'clock, the wild rose opened her smiling face; Dandelion and Solanum nigrum nodded at six o'clock; At seven o'clock, the peony began to bloom ... At noon, when the sun was at its peak, the beautiful midday flower showed its beauty; At six o'clock in the afternoon, the loofah flowers quietly opened; After sunset, cordate telosma quietly began to spit incense; Under the bright mountain, the moonlight flower began to open its petals, as if a beautiful woman had lifted her veil. Plants know time, and so do small animals. At dawn in the east, birds begin to sing. At sunset in the western hills, birds enter the forest, chickens return to their nests, but mice hiding in holes are ready to move. Owls seem to know mice like the back of their hands. It sleeps during the day, patrols the fields at night to catch mice, has no small alarm clock, and then wakes up naturally. Not only that, even insects without watches know that flowers bloom and fall: industrious bees fly to morning glory and afternoon flowers. As for Noctuidae, they are guests of cordate telosma. I always go to see her on time every night. Some people think that the appearance of the sun and the ebb and flow of tides are the time when living things exist. But this knowledge is the external condition of biology. There is also a clock-like mechanism in animal and plant life, called biological clock. It is by biological clock that flowers and plants can sense time and insects can "keep appointments" on time.