Questions

Ocean trenches are the deepest parts of the ocean. Deep ocean trenches are associated with Constantly Moving a certain type of volcanic chain called an island arc and with zones of high earthquake activity.

Leukocyte, commonly known as a white blood cell (WBC), is a major component in protecting the body against invading microorganisms and body cells with mutated DNA, and they clean up debris. 

B Lymphocyte also called as B-Cells or plasma cells produces the antibodies or immunoglobulins that bind to specific foreign or abnormal components of plasma membranes. This is also referred to as humoral (body fluid) immunity.