( ( ( The ( second type ) ) ( of phototaxis ) ) ( ( is ( ( ( true phototaxis ) , ) ( which ( ( is ( a ( directed movement ) ) ) ( ( up ( a gradient ) ) ( to ( ( an ( increasing amount ) ) ( of light ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ second) (NN type)) (PP (IN of) (NP (NNS phototaxis)))) (VP (VBZ is) (NP (NP (JJ true) (NNS phototaxis)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (DT a) (JJ directed) (NN movement)) (ADVP (RB up) (NP (DT a) (NN gradient)) (PP (TO to) (NP (NP (DT an) (VBG increasing) (NN amount)) (PP (IN of) (NP (NN light))))))))))) (. .)))
The second type of phototaxis is true phototaxis, which is a directed movement up a gradient to an increasing amount of light.
(ROOT (S (NP (NNS Phototaxis)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (NN movement)) (PP (IN toward) (NP (NN light))))))) (. .)))