What is a Hypoxic Zone and why are they important

Dead zones are low-oxygen, or hypoxic, areas in the world's oceans and lakes. Because most organisms need oxygen to live, few organisms can survive in hypoxic conditions. That is why these areas are called dead zones.

There is a difference in how a dead zone is defined. For scientists it refers to low-oxygen areas, normally on a coastline, caused by human activity. For sailors a dead zone is one with no wind, no current and no sea life. And these days, with significant amounts of plastic waste.

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radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current