<span>That his physiology is functioning normally.</span>
Answer:
Explanation:
The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens.
Your body's cells have proteins that are antigens. These include a group of antigens called HLA antigens. Your immune system learns to see these antigens as normal and usually does not react against them.
Answer:
D
Explanation:
Gene pool is the total genetic diversity within a population or species
Answer:
I need an answer to but I'm probably gonna just type a random sentence
Explanation:
It can be shown and proven right in front of you. You can also interact with it.