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.
Some scientists speculate that RNA may have been the first organic molecule to evolve. In fact, they think that early life was based solely on RNA and that DNA and proteins evolved later. This is called the RNA world hypothesis.