( ( 1 -RRB- ) ( ( Each sperm ) ( ( has ( ( ( ( ( ( ( ( a head ) ( -LRB- ( ( ( nucleus and ) acrosome ) -RRB- ) ) ) , ) ( midpiece ( -LRB- ( mitochondria -RRB- ) ) ) ) , ) and ) tail ) ( -LRB- ( microtubules -RRB- ) ) ) ) . ) ) )
(ROOT (S (LST (LS 1) (-RRB- -RRB-)) (NP (DT Each) (NN sperm)) (VP (VBZ has) (NP (NP (NP (NP (DT a) (NN head)) (PRN (-LRB- -LRB-) (NP (NP (NN nucleus)) (CC and) (NP (NN acrosome))) (-RRB- -RRB-))) (, ,) (NP (NP (NN midpiece)) (PRN (-LRB- -LRB-) (NP (NNP mitochondria)) (-RRB- -RRB-))) (, ,) (CC and) (NP (NN tail))) (PRN (-LRB- -LRB-) (NP (NNS microtubules)) (-RRB- -RRB-)))) (. .)))
1) Each sperm has a head (nucleus and acrosome), midpiece (mitochondria), and tail (microtubules).
(ROOT (S (NP (NP (DT The) (NN head)) (PP (IN of) (NP (DT the) (NN sperm)))) (VP (VBZ contains) (NP (DT the) (NN nucleus))) (. .)))
The head of the sperm contains the nucleus.