Ramon is observing slides of transverse sections of roots of unlabeled plants. one of the slides shows a vascular bundle that is arranged as a ring of xylem and phloem about the center of the root. another slide shows a central bundle of xylem and phloem arranged in an x formation. what kind of roots is he observing?

a.)dicot and monocot respectively

b.)monocot and dicot respectively

c.)dicot roots of two different varieties of plants