The answer is nitrogen. It is usually regarded as a growth-<span>limiting</span> factor for <span>primary</span> <span>producers</span> such as <span>phytoplankton</span>. It is <span>usually</span> taken up in the ‘fixed’ form of ammonium. It is converted from
<span>dissolved</span> nitrogen gas in ocean surface
to a ‘fixed’ form by particular microbes. Due to <span>increasing</span> global <span>temperatures,</span>
as a result of global warming, the ocean temperatures have increased hence
oceans hold less dissolved oxygen than they used to. <span>The low</span> oxygen concentration in the oceans <span>induces</span> the loss of nitrogen from oceans through <span>increased</span> activity of micro-<span>organisms</span> that are significant in
denitrification. This rate becomes higher than that of nitrification that fixes
nitrogen in the oceans. <span> </span><span> </span>
Answer:Sugar molecules contain carbon, hydrogen, and oxygen: Their hydrocarbon backbones are used to make amino acids and other carbon-based molecules that can be assembled into larger molecules (such as proteins and DNA)
