<span>The immune system fights off infectious disease. This is the system which produces cells that fight off the common cold. This system is also very closely related to the lymphatic system. Some people have much stronger immune systems that others.</span>
Answer:
D. Burning a peice of wood
Explanation:
Because when you burn wood a chemical reaction happenes between the flames and the wood making the wood into ashes.
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Answer:a
Living things are divided into five kingdoms: animal, plant, fungi, protist and monera
Heterogenous mixtures can separates due to differences in size of components
