Biological change over time accounts for the diversity of species. this diversity

a. develops through gradual processes over many generations.

b. develops only through sudden change over a single generation.

c. occurs in the animal kingdom but not in the plant kingdom.

d. occurs in the plant kingdom but not in the animal kingdom.

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:

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides