Take your own advice.
According to this link the numbers are 3-30 million.
http://animals.about.com/b/2007/08/13/how-many-species-on-earth.htm
This site says 5-30 million and according to the 2005 Millennium Ecosystem Assessment notes, "approximately 2 million have been formally described. "
http://www.enviroliteracy.org/article.php/58.html
Finally, did I say there were 10 million
known species? I don't believe I ever made a distinction, sue me for not doing so but it doesn't matter.
We aren't talking about plants.
I'M also not talking about hermaphrodites (both types) or life that may be asexual in nature. The two links I provided have nothing to do with plant life, cover animal life and place the numbers higher than what you stated.
No one said this wasn't the case, nor was it ever implied. What was clearly stated is that the environment has a role in the sexual behavior, and the following quote from the article posted by the OP endorses what I've previously said about homosexual activity in prison, transitional and transitory homsexuality.