Test for teenage boys' depression. 18th February 2014 --Teenage boys with symptoms of depression who also have raised levels of the stress hormone cortisol are up to 14 times more likely to develop major depression than those without.
Rating Newest Oldest. Best Answer: Most scientists believe that the first life forms were evolved in oceans that were BGA(blue green algae). Many believe that with these algae a simple organism named cyano bacteria was also evolved. Source(s): Shivansh Â· 5 years ago.
After the electrons and hydrogen protons are separated from oxygen, the oxygen diffuses out of the leaves via the stomata in seed plants. The first organisms to use photosynthesis were cyanobacteria. Large quantities of oxygen gas was bonded to various elements when photosynthesis first was evolved.