Answer:
In cases of immune system overactivity, the body attacks and damages its own tissues (autoimmune diseases). Immune deficiency diseases decrease the body's ability to fight invaders, causing vulnerability to infections.
Explanation:
Answer:
B)an amine group, a functional R group, and a carboxyl group
Explanation:
Going down A-D
Going across is 1-4
A 4
B 3
C 1
D 2
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Plants reduce the carbon dioxide (CO2) in the atmosphere and create more oxygen, which is needed by all organisms, through photosynthesis. :)
