if you are looking for an alphabet letter, I believe Haploid cells are symbolized by a lowercase n, which then alludes to the present number of chromosomes in the sex cell.
Number <u>3</u> is the chloroplast. The chloroplast helps the plant obtain food by <u>photosynthesis</u>. Number <u>1</u> is the central vacuole. The central vacuole helps a plant maintain its structure by <u>turgor pressure</u>.
