Question

why is formation of urine and its removal necessary for plants​

Answer 1

The waste products, like oxygen, carbon dioxide and water, are the raw materials for other cellular reactions. The excess of carbon dioxide and water are used up in this way. ... Plants also store waste within their leaves or barks. These wastes are periodically removed as the leaves and barks fall off.

Answer 2

$Answer \: By \: @Miisincreadible$