Answer: B-cells fight bacteria and viruses by making y-shaped proteins called antibodies, which are specific to each pathogen and are able to lock onto the surface of an invading cell and mark it for destruction by other immune cells. C-cells are a virus-bound antibody that binds to receptors, on the surface of phagocytic cells and triggers a mechanism known as phagocytosis, by which the cell engulfs and destroys the virus.
Explanation: sorry this answer was not simple at all -_-
Answer:
1.an atom that has gained or lost electrons:
2. produces OH - ions when added to water:
3. produces H† ions when added to water:
Answer:
definition: one of the three primary embryonic cell layers.
