his Pedigree tracks the inheritance of attached earlobes through 3 generations in a family. Open circles/squares are unattached earlobes and shaded circles/squares are attached earlobes. a. Is this a dominant or a recessive trait

its b

explanation:

there is no change

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:

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.