Actually, the Banana spider is near-harmless. You must have it confused with the Brazilian Wandering Spider, which is also referred to as the Banana Spider but is not black and yellow. The Wanderer has the deadliest of all spider venoms, capable of paralyzing victims of it's bite. It is quite fond of Bananas for some reason, hence the nickname Banana Spider.
The Banana Spider, better known as the Golden Silk Orb-Weaver, is the black and yellow spider I believe you were referring to. It holds a neurotoxin very similar to that of the black widow, however it is not nearly as potent. While the Black Widow's bite can be lethal to humans, the Golden Silk's bite would simply cause redness and irritation and would disappear within 24 hours.
no but they are endangered
i think it is poisonus. well, sometimes.
yes
Nope
No
A black spotted yellow spider that just ate a gumball.
It takes a bit more information to properly identify a spider than what is provided. Note that the black widow is notfuzzy (covered with hairs).
My guess is that this spider you saw was either a Jumping Spider (quite possibly a Daring Jumping Spider) or a Parson Spider.
It is the common "Daring jumping spider," Phidippus audax. It's completely harmless.
yes
Northern Black Widow, and it is most likely poisonous.
a little spider black legs and yellow back with black spots
I don't remember the name but they are poisonous. very poisonous
Sounds like a "Spotted Ground Swift Spider"http://www.geocities.com/brisbane_spiders/Corinnidae.htm
yes
Its piosonous alright, but I dont know what its called.
No
Almost all ladybugs have spots so why don't you find one and see if they are poisonous. But, if you were asking me, i'd say they aren't poisonous!
It sounds like the famous black widow spider. they can be poisonous but if you avoid them at all costs they wont bother you, they only bite if you poke at them and go near and annoy them !!
a type of jumping spider?
the cheetahs color are brownish with black spots