Question

1. what is the function of a plasma membrane that all living cells depend on? 2. without a plasma membrane, what would cells be unable to maintain?

Explanation:

1. The plasma membrane acts as a selective barrier, controlling the movement of substances in and out of the cell, and also plays roles in cell - cell recognition and communication.
2. Without a plasma membrane, cells would be unable to maintain homeostasis, which includes maintaining a stable internal environment such as proper ion concentrations, pH, and osmotic balance.

Answer:

1. It acts as a selective barrier and is involved in cell - cell recognition and communication.
2. Homeostasis.