Microorganisms such as bacteria can be removed by disinfection. Certauns substances called biocides are addes to water to make it pure. Purification can also be done by UV-light .
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B. a form of gene is the correct answer
Answer:
organelles such as nuclei, mitochondria or chloroplast
<span>The atomic mass is the number of protons plus the number of neutrons in an atom.</span>
