Mycorrhizal fungi are
a. mutualistic root-dwelling fungi that plants obtain more water and nutrients.
b. mutualistic leaf-dwelling fungi that obtain sugar from plant leaves
c. parasitic leaf-dwelling fungi that strangle plants
d. epiphytic plants living on plant stems and leaves

The answer is a. mutualistic root-dwelling fungi that help plants obtain more water and nutrients.

A mutualistic relationship between fungi and plants is known as mycorrhiza. Mutualism is a relationship between two different species in which both species have benefits. In mycorrhiza, the fungi get the product of photosynthesis in plants, and plants absorb water nutrients (phosphorus and nitrogen) through fungi.

i believe it would be the lungs.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: