( ( ( These changes ) ( which ( we ( know ( so well ) ) ) ) ) ( ( ( are ( examples ( of ( ( microevolution or ) evolution ) ) ) ) ( ( ( at or ) below ) ( the ( species level ) ) ) ) . ) )
(ROOT (S (NP (NP (DT These) (NNS changes)) (SBAR (WHNP (WDT which)) (S (NP (PRP we)) (VP (VBP know) (ADVP (RB so) (RB well)))))) (VP (VBP are) (NP (NP (NNS examples)) (PP (IN of) (NP (NN microevolution) (CC or) (NN evolution)))) (PP (IN at) (CC or) (IN below) (NP (DT the) (NN species) (NN level)))) (. .)))
These changes which we know so well are examples of microevolution or evolution at or below the species level.
(ROOT (S (NP (NP (NNP Evolution)) (SBAR (WHNP (WDT that)) (S (VP (VBZ occurs) (PP (IN over) (NP (NP (DT a) (JJ short) (NN period)) (PP (IN of) (NP (NN time))))))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN microevolution))))) (. .)))