Answer:
Step-by-step explanation:
A treelike microscopic structure that extends through invagination of cell membrane into plant root cells to form a mutualistic symbiosis between a glomeromycetes fungi and a plant is called:
Ectomycorrhizal (ECM) symbiosis is a mutualistic interaction between certain soil fungi and fine roots of perennial plants, mainly forest trees, by which both partners become capable of efficiently colonising nutrient-limited environments.