( ( Circadian ( and ( circannual cycles ) ) ) ( ( fall ( into ( this category ) ) ) . ) )
(ROOT (S (NP (NN Circadian) (CC and) (NN circannual) (NNS cycles)) (VP (VBP fall) (PP (IN into) (NP (DT this) (NN category)))) (. .)))
Circadian and circannual cycles fall into this category.
(ROOT (S (NP (JJ Circannual) (JJ behavioral) (NNS rhythms)) (VP (VBP are) (VP (VBN linked) (PP (TO to) (NP (NP (DT the) (JJ yearly) (NN cycle)) (PP (IN of) (NP (NNS seasons))))))) (. .)))