Question

mention the vegetation according to the height

Answer 1

Like most other plants, trees fuel their growth and development through photosynthesis.The sugar-rich fluid produced through photosynthesis in the leaves travels to other parts of the tree via a system of channels called phloem.The researchers modeled the tree phloem system as if it were composed of permeable, cylindrical tubes. The leaf phloem collected the sugar-rich fluid and generated energy to transport it through a much longer tube running down the the fluid passed through the leaf phloem toward the stem, it gathered speed as more and more water was pulled in from the leaf through osmosis. Consequently, the longer the leaf, the faster the fluid flowed, much like streams rushing toward a river.When the fluid reached the tree trunk, however, no more sugar was collected in the phloem, and only water was drawn from the surrounding tissue. The trunk phloem was longer and, consequently, presented more resistance to the fluid’s flow as it traveled down the trunk and to the roots.

Increased height might provide some trees with better access to sunlight, it also would increase the length and thus flow resistance of the trunk phloem, slowing the movement of nutrients toward the root so there comes a point where the optimal limits on tree height indicate the point at which it is no longer advantageous for the tree to become taller.