( ( ( ( ( Gastropods ( have ( ( ( ( a ( single shell ) ) ( -LRB- ( ( in ( ( ( a spiral ) or ) ( modified ( spiral form ) ) ) ) -RRB- ) ) ) and ) ( eyes ( on stalks ) ) ) ) ) , ) and ) ( they ( move ( on ( a ( flattened ( , ( muscular foot ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Gastropods)) (VP (VBP have) (NP (NP (NP (DT a) (JJ single) (NN shell)) (PRN (-LRB- -LRB-) (PP (IN in) (NP (NP (DT a) (NN spiral)) (CC or) (NP (VBN modified) (NN spiral) (NN form)))) (-RRB- -RRB-))) (CC and) (NP (NP (NNS eyes)) (PP (IN on) (NP (NNS stalks))))))) (, ,) (CC and) (S (NP (PRP they)) (VP (VBP move) (PP (IN on) (NP (DT a) (JJ flattened) (, ,) (JJ muscular) (NN foot))))) (. .)))
Gastropods have a single shell (in a spiral or modified spiral form) and eyes on stalks, and they move on a flattened, muscular foot.
(ROOT (S (NP (DT A) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NNS gastropods)) (VP (VBZ is) (VP (VBN noted) (PP (IN for) (S (VP (VBG having) (NP (PRP$ its) (NNS eyes)) (PP (IN at) (NP (NP (DT the) (NNS tips)) (PP (IN of) (NP (NNS stalks) (CC or) (NNS tentacles))) (SBAR (WHNP (WDT that)) (S (VP (VBP emerge) (PP (IN from) (NP (PRP$ its) (NN head))))))))))))) (. .)))