small nuclear RNA & pseudo gene questions?

Question

1. Kinds and uses of small nuclear RNA
2. Why does pseudogene exist?

pls give me websites or the answers.
ive been browsing it in the net for weeks, but i couldnt find a direct answer. thank you!

Answer 1

1) http://en.wikipedia.org/wiki/Non-coding_RNA

-Under "Small Nuclear RNA"

2) http://en.wikipedia.org/wiki/Pseudogene

-Under "Types and Origin"


Hope this helps!