Can plants exercise? "Research report.

Liang Xiaoqi, Class 4, Longdong Primary School (1) 1. Foreword Plants are friends of human beings, but many people have never really seen or cared about them. On the street, ask anyone casually: Can plants exercise? That man can't answer, but some people care about plants, but they can't answer. It doesn't matter. Now, let's solve this mystery! Second, data collation is different from most animals, and plants cannot move actively as a whole. But all parts of plants also carry out various sports. The movement of organelles and the flow of protoplasm in cells are invisible to the naked eye, and all kinds of growth movements are usually extremely slow and not easy to be noticed. The movement of sunflower plants can be divided into phototropism, geotropism and tactile sensation, and the sunny movement of sunflower flowers is typical phototropism. Look at the sunflowers in the field. Mimosa plants are different from animals. They have no nervous system, no muscles, and can't perceive external stimuli. Different from ordinary plants, mimosa plants droop and close their small leaves when touched by the outside world. This action is understood as shyness, so it is called mimosa. The movement of white water lily plants is a common phenomenon. According to different meanings, there are various movements, such as protoplasm movement, swelling and growth movement of plants, and the movements stimulated by the outside world include tendency movement, tropism movement and nasal movement. This is a sleeping lotus in full bloom. Have you noticed that as the sun goes down, the flowers will gradually close, as if they want to sleep at night, hence the name water lily. Dancing grass This is an ordinary grass. When people talk or sing to it, the small leaves will dance left and right, just like the grass will dance when it hears your voice, so people call it dancing grass. Dancing grass belongs to Leguminosae, which is produced in some provinces and regions of South China. Now many botanical gardens have planted dancing grass, which has attracted much attention as a kind of moving pet. The secret of seed spread The achene of Taraxacum mongolicum, a compositae plant, spreads like a parachute when it matures and flies with the wind, spreading the seeds far away. Hongliu, do you know the mystery of catkins flying in spring? Grab a group of catkins and observe carefully. You will find that there are some small particles in it, which are the seeds of willow trees. Willow trees spread the seeds to the distance through the flying catkins. You may have seen Xanthium sibiricum, a plant. Whenever you come back from a field trip in autumn, its fruit will hang on your clothes. Look carefully, its bristles have barbs at the top, which can be firmly hooked and not easy to fall off. Before you know it, you have done your duty to spread its seeds. There are many plants that spread seeds like Xanthium sibiricum. In grassland and pastoral areas, this plant is very harmful to wool textile industry. The bristles of this plant in wool will greatly reduce the quality of finished products, and even the wool textile industry has burr detection technology. Impatiens balsamina fruit will bounce off, crack and throw a bullet in all directions, which is another example of mechanical seed transmission. The longest-lived seed Gu Lian's seed has the longest life span, which can exceed 1000 years. This is a lotus seed excavated from the coal seam, which is carefully cultivated after germination and called Gulian. Third, the source of information "the kingdom of plants" found on the Internet Fourth, feelings (personal opinions) Fifth, my creation Little Hedgehog and cactus In the evening, Little Hedgehog came out for food and saw a pot of cactus. The hedgehog, who had never seen cactus, thought it was a naughty guy squatting on the flowerpot, and warned, Hey, you are so naughty, be careful that people knock you on the head with a bamboo pole! No, people put me here. You are really good at telling jokes. Hedgehogs can be planted in flowerpots! I am not a hedgehog, but a cactus, a plant. Is it a plant? Hedgehog carefully studied the cactus and said, hmm! You are really not a hedgehog. But you are lying when you say you are a plant! No, I'm telling the truth. My round body is a stem and my thorns are leaves. The hometown of our cactus originally lived in tropical and subtropical deserts. There is little rain and water all the year round, with occasional showers. The dry and hot climate soon evaporated the water. In order to survive in such an environment, we must store enough water in our bodies. In this way, our stems gradually became fleshy stems. With succulent stems rich in water, we can survive even in the long dry weather.