Simply so, do trees grow from top or bottom?
Trees grow from the roots upwards and the trunk increases by one annular ring every year The leaves and branches grow at the top, as the lower branches tend to die off unless someone or something does a bit of pruning and activates new growth.
Subsequently, question is, can two plants grow from one seed? Because seed are actually immature embryos and this embryo by growing convert into a plant. But polyembryony ( more than one embryo) is also found in some plants. That's why the seed you assuming will give one plant depending on their embryo number each embryo will produce one plant.
Herein, how does a plant know which way to grow?
In mature plants, phototaxis (growing towards the light source) overrides the gravitational impulse for the stalk and leaves, but the roots – and the seed while it is underground – rely on gravity for orientation.
How do trees grow straight up?
At the top of a shoot and at the bottom of a root, a cluster of dividing cells can be found. These cells are responsible for the direction of the growth, and thus make the tree grow straight. These granules are affected by gravity, like all loose things on earth, so they will always be at the lowest point of the cell.
