The cells responsible for the production of circulating immunoglobulins are cells.

The cells responsible for the production of circulating immunoglobulins are Plasma cells (white blood cells).

Explanation: Immunoglobulins are the glycoprotein molecules.They produce immune response by recognizing and binding to the particular pathogen.

Plasma cells are found in bone marrow. B cells differentiate into plasma cells and produce immunoglobulins.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

weathering is the answer.