Do these mean the same?
In some species , the withdrawn invert and lophophore are protected by an operculum ( '' lid '' ) , which is closed by muscles and opened by fluid pressure .
In some species the retracted invert and lophophore are protected by an operculum ( '' lid '' ) , which is closed by muscles and opened by fluid pressure .

OPTIONS:
[1]. no
[2]. yes
[2].