The outermost layer of plant stems in discotyledons consists of epidermal cells and guard cells that surround opening called stomata. The epidermal cells are usually covered whit a waterproof layer that

The outermost layer of plant stems in discotyledons consists of epidermal cells and guard cells that surround opening called stomata. The epidermal cells are usually covered whit a waterproof layer that provides protection from injury and water loss. The stomata allow gas exchange.The epidermal cells and stomata have function similar to those of which two human body system

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