This maize plant could not efficiently move water nor would it have good structural support, so it would be more like a moss, which faces the same challenge. Given how this keeps mosses very short, the maize plant would also be very short.
Work Step by Step
Look in the textbook for the normal roles of vessels (support, water transport). Imagine what would happen without these (dwarfing; review mosses and other bryophytes to see this).