( Thus ( , ( ( in ( asexual reproduction ) ) ( , ( ( only ( one parent ) ) ( ( is ( needed ( to ( produce ( a ( new organism ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (PP (IN in) (NP (JJ asexual) (NN reproduction))) (, ,) (NP (RB only) (CD one) (NN parent)) (VP (VBZ is) (VP (VBN needed) (S (VP (TO to) (VP (VB produce) (NP (DT a) (JJ new) (NN organism))))))) (. .)))
Thus, in asexual reproduction, only one parent is needed to produce a new organism.
(ROOT (S (NP (NNP Trees)) (VP (VBP send) (PRT (RP out)) (NP (NP (JJ rootlike) (NNS extensions)) (SBAR (WHNP (WDT that)) (S (VP (VBP produce) (SBAR (S (NP (JJ new) (NNS stems)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (JJ asexual) (NN reproduction)))))))))))) (. .)))
Trees send out rootlike extensions that produce new stems is an example of asexual reproduction.