Antibodies are. part of the third line of defense, which activates T-cells and B-cells
part of the second line of defense, which causes a fever
not part of the immune response
part of the first line of defense, which brings white blood cells to the invader

A. Part of the third line of defense, which ativated T cells and B cells.

Explanation:

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:

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion