Want this question answered?
the stem
bgbgg
Roots
A plant cells consists of a cell wall (it hold the plant upright) and contains chlorophyll to feed itself.
They don't hold you upright, more like sideways...
There are at least 2 ways in which a plant's stem system can help a plant to survive in it's environment. It both helps keep water in the plant and hold the plant upright for example.
Turgid walls help hold the plant upright by internal water pressure. A adaption that allowed plants to acquire the land as a niche.
Plant stems hold the plant upright an carry nutrients from one part of the plant to the other.
Those are called the "eyes" of the potato and sprout when the potato isn't as fresh any longer; these are called seed potatoes. You can actually plant the potato "eyes" (or the whole potato) and they will grow more potatoes, but you have to do it at the right planting time for where you live. You can also sprout them in a glass of water indoors and they will grow long vines, much like a house plant. To do this, insert toothpicks around the center of the potato so they will hold the top half out of the water, otherwise the whole potato will rot.
To act as a conduit for sap and to hold the flowers upright.
... is to hold testtubes in upright position.
An easel.