75% species go extinct to be considered a mass extinction
I think the system you are referring to is the muscular system
Answer;
Antibodies.
The human immune system fights infection by releasing antibodies.
Explanation;
The immune system acts to defend the body against pathogens such as viruses, bacteria and fungi that may cause a disease.
It does so using various types of mechanism, one is by the production of antibodies.
Antibodies are proteins that are produced by the B-cell and are used by the immune system to identify and neutralize pathogens.
These antibodies also activates proteins known as complements which assist in the killing of bacteria, viruses and the infected cells.
Answer:
C
Explanation:
As air passes through our own body causing respiration
Answer:
Men:8% Women:0.5%
Explanation: Probability of color blindness in men: 8% Probability of color blindness in women: 0.5% Average class size: 20 pupils. Group line-up: 50% male – 50% female.
