Question

why do some plants can't stand erect??​

Answer 1

Because they can’t develop tissues
As a result their shoots aren’t strong enough to hold them straight

Answer 2

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"A plant can not stand erect without a cell wall." This statement is correct because in a plant cell the cell wall is a rigid, and hard and protective structure. It makes the plant shoot hard and rigid so that the plant can stand erect and prevents the plants from bending down and getting broken.

HØPÈ ÏT HÊLPS ♠♦♠