They r very productive agriculturally
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Before viruses can reproduce, they must infect a host cell.
Viruses need a way to enter the body before they can infect a host cell.
<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>
Carbohydrates
Proteins
Lipids
Water
Vitamins and minerals
