( ( As ( ( the ( bacterial population ) ) grows ) ) ( , ( ( the food ) ( ( can ( become slimy ) ) . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (DT the) (JJ bacterial) (NN population)) (VP (VBZ grows)))) (, ,) (NP (DT the) (NN food)) (VP (MD can) (VP (VB become) (NP (JJ slimy)))) (. .)))
As the bacterial population grows, the food can become slimy.
(ROOT (S (SBAR (IN As) (S (NP (DT the) (NN population)) (VP (VBZ grows)))) (, ,) (NP (NP (NN competition)) (PP (IN for) (NP (NN food)))) (VP (VBZ grows)) (. .)))