( ( Even ( though ( ( sexual reproduction ) ( requires ( ( more ( ( energy and ) time ) ) ( than ( asexual reproduction ) ) ) ) ) ) ) ( , ( it ( ( ( provides offspring ) ( with ( ( a ( unique ( genetic makeup ) ) ) ( that ( may ( ( provide them ) ( with ( ( a ( selective advantage ) ) ( in ( an ( unpredictable environment ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (RB Even) (IN though) (S (NP (JJ sexual) (NN reproduction)) (VP (VBZ requires) (NP (NP (JJR more) (NN energy) (CC and) (NN time)) (PP (IN than) (NP (JJ asexual) (NN reproduction))))))) (, ,) (NP (PRP it)) (VP (VBZ provides) (NP (NN offspring)) (PP (IN with) (NP (NP (DT a) (JJ unique) (JJ genetic) (NN makeup)) (SBAR (WHNP (WDT that)) (S (VP (MD may) (VP (VB provide) (NP (PRP them)) (PP (IN with) (NP (NP (DT a) (JJ selective) (NN advantage)) (PP (IN in) (NP (DT an) (JJ unpredictable) (NN environment)))))))))))) (. .)))
Even though sexual reproduction requires more energy and time than asexual reproduction, it provides offspring with a unique genetic makeup that may provide them with a selective advantage in an unpredictable environment.
(ROOT (S (NP (NP (DT The) (JJ primary) (NN advantage)) (PP (IN of) (NP (NP (JJ sexual) (NN reproduction)) (SBAR (WHADVP (WRB when)) (S (VP (VBN compared) (PP (TO to) (NP (JJ asexual) (NN reproduction))))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (EX there)) (VP (VBZ is) (NP (NP (JJR greater) (JJ genetic) (NN variety)) (PP (IN in) (NP (NN offspring)))))))) (. .)))