a) explain how does the exchange of gasses occurs in plants across of the surface of stem ,roots and leaves .
b) how are water and minerals transport in plants .
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Explanation:
a. In all the three plant parts the exchange of gases takes place through diffusion. However the surface of a young stem will have stomata, while that of an older stem will have lenticels. ... Lenticels are open pores. In roots stomatal pores as well as lenticels are absent, exchange of gases occurs through root hairs
b. In plants, minerals and water are transported through the xylem cells from soil to the leaves. The xylem cells of the stem, roots, and leaves are interconnected forming a conducting channel reaching all plant parts. ... Osmosis causes osmotic pressure hence water and minerals are transported from one to another cell.
b
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