植物顺应环境生长英语作文
Why can't the world's trees, including 132 meters tall eucalyptus trees and 115 meters high Sequoia trees, grow tall indefinitely?
According to Darwinian "natural lection" theory, trees are outstanding in environmental adaptation. Just think, if the trees grow infinitely high, it will attpull什么意思
ract wind and lightning splitting, but also cau sunlight, oxygen, water, nutrie家常肉饼
nts supply shortage, and the temperature and other restrictions. Self-support ability is also a big problem. Take the weight of the tree, assuming that a tree length and diameter increa 100 times, its size increa干桂圆
广州市培正中学
s 1焗生蚝
million times, the weight will increa the same multiple, and the pressure of the trunk is proportional to the cross-ctional area, that is, only 10,000 times more, therefore, the cross-ctional area of each cubic centimeter is 100 times. load. Obviously, if the geometry of the trunk is alwa白羊座最佳配对
ys similar to the original, the trunk will be crushed by its own weight. Thus, the tree evolved its height to be limited. Of cour, the growth of the lateral branches also inhibited the growth of the top branches. That is why the trees can't grow taller indefinitely.
