True or false
yeasts are a type of sac fungi.
if false what type is it?

True

Explanation:

Yeast is the single-celled microorganism that is classified with the molds and mushrooms in the kingdom Fungi. It is a member of Group Ascomycota, which is also known as sac fungi.

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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:

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.