Check my answers !
a species is a group of organisms with distinct characteristics that match others in a population.
false
one of the most well-known researchers of living organisms and biodiversity was charles darwin.
true

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:

not sure if this is what you'r looking for eubacteria and archaebacteria