A person who has allergies has a compromised immune system because the body's immune system attacks its healthy cells.
overreacts to an antigen.
steals nutrients from healthy cells.
responds to mutagens.

Would really appreciate it, i have an idea but not completely sure

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

The unique structure of the neuron is dedicated to the efficient and rapid transmission of neural signals. the relationship between neurons, the spinal cord, and the brain constitutes an elaborate communication system throughout the human body. all but one of the functions listed below are a result of this interaction.