一、问题的提出 植物的生长是靠根从土壤里吸取水分,靠它的叶子利用阳光进行光合作用来制造养分的。因此。根总是往下伸,芽总要向上长,这是它们的特性。正因为它们有这样的特性,所以,人们无论把种子怎样播进土壤里,它的芽都能够向上钻出土壤,而它的根却向下深深地扎进土壤里。芽和根的生长方向与种子摆放的方向有没有关系?能改变芽和根的生长方向吗? First, the problem raised Plant growth is rooted from the soil to absorb water, rely on its leaves to make use of sunlight for photosynthesis to create nutrients. therefore. The roots always extend downward, the buds always grow upward, and this is their character. Because of their unique characteristics, no matter how the seeds are sown in the soil, their buds can drill out into the soil, while its roots plunge down into the soil. Is there any relationship between the growth direction of bud and root and the direction of seed placement? Can the growth direction of bud and root be changed?