Which cell is responsible for letting good in keeping bad things out?

The cell that is responsible for letting good in keeping bad things out is the cell membrane.The cell membrane protects the inside and outside of the cell.:))

This is what i found on google “phytoplankton, tiny organisms that live in the ocean, are autotrophs. some types of bacteria are autotrophs. most autotrophs use a process called photosynthesis to make their food.” i hope this you for what your looking for

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