Problem: Mycorrhizal fungi form essential symbioses with plant roots, providing them with mineral nutrients and greatly extending the effectiveness of the root hairs. Mycorrhizal species are grouped into two main groups: ectomycorrhiza and endomycorrhiza. The ectomycorrhiza colonize the ________ of plant root cells and the endomycorrhiza colonize _________ of plant root cells. Group of answer choices outside; the inside inside; the outside inside the cortical structures; on the surfaces not enough information. Need Assignment Help?