Why do you think that root hairs are produced only on the parts of the root system that have stopped growing? : What structures help to keep the stem’s shape and upright position?

question no 1 answer

A root hair,or absorbent hair, the rhizoid of a vascular plant, is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root. As they are lateral extensions of a single cell and only rarely branched, they are visible to the naked eye and light microscope. They are found only in the region of maturation of the root. Just prior to and during root hair cell development, there is elevated phosphorylase activity. Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. Another adaptation that they have is a large permanent vacuole.

question no 2 answer

Stems hold the plant upright and support it. They also transport water, minerals and sugars to the leaves and roots.

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because i have taken it on by book