【摘 要】
:
The phototropism of plants is a very important instinct for them having emerged early in the process of their long-term evolution. It can be said that the vast majority of plants only grow under the e
【出 处】
:
KNOWLEDGE IS POWER
论文部分内容阅读
The phototropism of plants is a very important instinct for them having emerged early in the process of their long-term evolution. It can be said that the vast majority of plants only grow under the effect of light. But the process they "see" the light is quite different from our visual production. Because the core concept of our vision is the formation of subjective physiological images. But plants do not have neural networks or the brain, hence they cannot form this image, so from this definition, the plant has no vision. So how do they feel the light? In fact, there are some special photographic proteins in their cells, photosensitive pigment. Once receiving light stimulation, they will stimulate related cells to produce, resulting in the growth towards the light.
(Answerer: CHEN Yingting)
其他文献
液压油作为液压设备的工作介质,在液压设备中起到动力传递、散热、润滑以及清洗元件的作用。液压油在工作过程中极易被来自系统内、外两部分的固体颗粒污染,造成油液老化、运动副磨损、阀芯卡紧以及吸油管路堵塞等一系列问题,对液压设备的正常运行造成严重危害,因此控制油液中杂质的含量具有重要意义。
滤芯过滤是控制油液污染的主要措施,为液压系统的正常工作起到良好的保障作用。但滤芯过滤主要存在过滤精度与使用寿命的天然矛盾。过滤精度的提高,必然导致使用寿命的降低。因此滤芯过滤对于小尺寸污染颗粒的控制,特别是一些小尺寸
Twenty-four solar terms can reflect the climate change in the four seasons. Ancient people use it to guide agricultural activities, and it has affected thousands of households. Today, it has been incl
Clouds are water droplets, cold water droplets, ice crystals, or a mixture of visible polymers in the atmosphere. Clouds not only vary in shape, but also in color, making the dull sky colorful. But yo
Aerospace Suits: Priceless Clothing
First of all, hearing is brain reaction triggered by the stimulation on auditory nerves hidden in the inner ear made by the air vibration, which is delivered to the inner ear by the sound waves. With
When you put on a headset and enjoy the music, have you been curious about the arrangement of the song, melody structure? When you blow the flute, play the violin, have you thought of where this wonde
Silk Road is an important channel for the exchange of ancient East and West. She as the world's common heritage, will always be remembered and cared by us. The history of the development of the ancien
When the farmers spray pesticides or other drugs, only 2% of them can be sprayed on plants while most of them are often out of the plant, falling on the land or becoming part of the runoff, leading to
People are often attracted by small animals. But only being cute, not quickly acquiring the necessary skills to survive, small animals can not survive independently. So, what are the basic skills that
Meteorology and life are closely related, and human beings have to learn to deal with and use it. Climate change will be affected by human activities whereas human production and life are carried out