Forum:Plant food chain question

I was kind of wondering.... if I activate Plant food chain does the card stay face up on the field like a continuous trap? And if so after it is destroyed by a card like mystical space typhoon is the effect still valid because it never got negated?

22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)Somerandomeperson (talk • contribs)Somerandoperson22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)22:30, January 26, 2011 (UTC)