this gatekeeper control change a certain structure that s is a gatekeeper in order to maintain h o m e o s t a s i s the gatekeeper control what is the able to enter and exit itself plant cell produce oxygen as a waste product what cell structure allows this oxygen to pass into the environment a c h l o r o p l a s t b a c u o l e c e n d o p l a s m i c r e t i c u l u m d cell membrane

The correct answer is:

d) cell membrane

The cell membrane is responsible for regulating the movement of substances in and out of the cell, including oxygen produced by a plant cell. The cell membrane allows oxygen to pass into the environment as a waste product of photosynthesis.