What is a soil horizon?
question 13 options:

soil that is still mostly rock material

bare soil from which all vegetation has been removed

a layer of soil with characteristic properties

a pictorial view of soil showing its ecosystem

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:

it should be briana that has it to me