Within a flower cell that has 26 chromosomes, how many chromosomes would a cell that is created whithin the stem of a flower as it grows, have? what is this process callled

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?