equestrian and sailing teams
none
There are a bunch of them - the 2008 Women's Olympic Swim Team. See the related link for a picture of them with their medals.
The same way all other sports do: by qualification.
yes
Yeah, they have regular volleyball and team volleyball.
show jumping or maybe dressage, something to do with horses
Yes, Houdini actually tried out for an Olympic team.
There are 529 athletes on the 2012 US Olympic team. There are 268 women and 261 men.
Karate is not one of the Olympic sports. Taekwondo is an Olympic sport and the US is participating.
In 1996, Rebecca Lobo won an Olympic gold medal in women's basketball. She was a key player on the U.S. women's basketball team during the Atlanta Summer Olympics. Lobo's performance helped elevate the visibility of women's sports during that era.
Lee Bodimeade.