Why is the cell membrane considered selectively permeable? Because some materials can come in and some materials must stay out Because some materials can come in and some materials must stay out Because it forms a barrier where all materials can get through Because it forms a barrier where all materials can get through Because it forms a barrier where no materials can get through Because it forms a barrier where no materials can get through

Because some materials can come in and some materials must stay out

Explanation:

Cell membrane is a structure that covers or bounds the cytoplasmic layer of every living cell. It is made up of mostly lipids. According to this question, it is regarded as selectively permeable. This means that it selects what goes into the cell and what comes out.

The cell membrane is capable of this because of its amphipathic nature i.e contains both hydrophilic and hydrophobic regions. Because the cell membrane controls what goes into the cell and what comes out of the cell, it is referred to as selectively permeable as some materials can come in and some materials must stay out.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.