Which structure is most directly responsible formaintaining homeostasis in all cells? a. chloroplastb. cell membranec. centrioled. cell wal

b. Cell membrane

Explanation:

Homeostasis is a set of conditions where an organism will function best. Every organism works hard in order to attain homeostasis and cell membranes play an important part in maintaining homeostasis.

The function of a cell membrane is to control the materials of coming in or out of the call. The cell membrane decides if that specific material will enter the cell or not based on the optimal concentration level.

i'd say that the moon rock is about 2.2 billion years old.