Which reason best explains why the cell membrane the cell maintain homeostasis?
the cell membrane is selectively permeable.
the cell membrane is composed of lipids and phosphates.
the cell membrane is both hydrophilic and hydrophobic.
the cell membrane is a bilayer structure.

Cell membranes allow the organisms to maintain the homeostasis by stimulating the materials which might move into or exit out of the cell. Cell membrane carriers a special feature called semi-permeability, wherein, it decides only some molecules move in or out of the cell.  

Further Explanation:

The plasma membrane or cell membrane is basically a barrier found between the cytoplasm inside the cell and external environment of the cell. This barrier is responsible for protecting as well as supporting the cell. It also helps in controlling the kind of molecules that move into and out of the cell. This ability to control the entry of certain molecules is called selective permeability or semi-permeability.

In order to function normally, a stable state needs to be maintained within the cell. For instance, the levels of nutrients, salts, and other materials that are required to be kept within a specific range. This process of maintaining the stable environment within the cell is referred as homeostasis. This process needs constant adjustments as the environment of the cell is always changing. By moving the molecules into as well as out of the cells, they keep the environment within the normal conditions and also aids in maintaining the homeostatic regulation within the cells. If this mechanism fails, disease or death of the cell/organism may follow.

Learn more:

Learn more about cellular respiration

Learn more about diffusion

Learn more about phospholipid bilayer

Answer Details:

Grade: High School

Subject: Biology

Chapter: Homeostasis  

Keywords:  

homeostasis, cell, semi-permeability, selective permeability, plasma membrane, cell membrane, disease, regulation, nutrient, barrier.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.