Why can't seeds grow in acid?

Question

Why can't seeds grow in acid?

Answer 1

Plants are made up of organic compounds (sugars) and proteins.  Acids break down the organic compounds and denatures the protein structures.  Essentially, if a plant were put in acid, the cells would rupture because the acid would slowly eat away at the at the cell wall components.

Answer 2

It kills them...

Answer 3

Seeds contain an embryo.  When they take in water they take in any chemicals in the water - the acid in the water is toxic to most seed embryos.