What purpose does the xylem serve in a plant

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

At what point in the eukaryotic cell cycle does mitosis occur