Biological hazards are substances derived from the metabolism of microorganisms that threaten the health of humans, animals and / or plants. Biological hazards include microorganisms such as bacteria, viruses and parasites. These microorganisms are often associated with food contamination, but their harmful effects can be seen in any living organism susceptible to contamination. The way to reduce this kind of danger is to maintain hygiene, temperature control, and any other activity that avoids the multiplication of microorganisms.
<span>USGS is gathering information in the Arctic Ocean to study acidification and identify a baseline of information about the ocean's chemistry. This chemistry is expected to change due to decreases in the amount of summer sea ice.</span>
Somatic mutations are mutations that occur in body cells, that is the cells that do not make gametes. These mutations are not passed on to further generations; for example, if a mutation that changes a gene in a skin cell would not affect your children because skin cells don't produce gametes.
