Answer:
Reduced levels of the neurotransmitters serotonin and norepinephrine may also contribute to the development of ADHD.
Explanation:
Answer:
is used to identify those who may have medical conditions which put them at a
Answer:
A fable uses animals to illustrate general truth about human nature
Explanation:
It should be A because this system relies on antigens which are specific substance found in foreign microbes.
