( ( ( ( Describe ( an ( amniotic egg ) ) ) and ) ( ( explain ( its significance ) ) ( in ( ( the evolution ) ( of ( reptiles ( , ( birds ( , ( and mammals ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VP (VB Describe) (NP (DT an) (JJ amniotic) (NN egg))) (CC and) (VP (VB explain) (NP (PRP$ its) (NN significance)) (PP (IN in) (NP (NP (DT the) (NN evolution)) (PP (IN of) (NP (NNS reptiles) (, ,) (NNS birds) (, ,) (CC and) (NNS mammals))))))) (. .)))
Describe an amniotic egg and explain its significance in the evolution of reptiles, birds, and mammals.
(ROOT (S (NP (JJS Most) (NNS reptiles)) (VP (VBD lay) (NP (JJ amniotic) (NNS eggs))) (. .)))