Human beings contribute to the phosphorus and sulfur cycles by using chemical fertilizers for the soil. This includes mostly synthetic fertilizers that can often be full of various molecules that include phosphorus and sulfur in them.
<span>Opaca and Marginal zone stays outer and does not move during chick gastrulation,
The zone opaca is a thick fringe ring comprising of more than one cell, it is joined to the germ wall. The Marginal zone lies at the fringe between the range opaca and the region pellucida</span>
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<span>Solar Flares-
A brief eruption of intense high- energy radiation from the sun's surface, associated with sunspots and causing electromagnetic disturbances in the earth, as with radio frequency communications and power line transmissions.
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The hormone human chorionic gonadotropin (HCG)
