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.
The time frame is well before the Cambrian Explosion 540 million years ago, in which most animals groups sprang up and took hold in a relatively short geologic stretch. That makes the humble sea sponge a likely bearer of the title first animal on Earth.. That's according to findings appearing in a paper just published in the journal Proceedings of the National Academy of Sciences by lead author David Gold and senior author Roger Summons, both from MIT.