<span>The molecules that provoke a specific immune response are called antigens.
</span>This molecule initiates the production of an antibody and causes an immune response. T<span>oxins, chemicals, bacteria, viruses, or other substances that come from outside the body can be part of the antigens.
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It is important because you need vitamins and minerals from them e.g. Scurvy no vitamin c
The hormone testosterone promotes sexual desires in both males and females
Mass is the amount of matter in any object.
Answer:
stomach, pancreas and small intestine
