i think the correct answer is B considering that the channels are not always open for the protons to freely diffuse through the inner membrane.
Answer:
A:inside the cell is 10%
B:the water outside the cell is 90%
C:Yes osmosis occur
Embryonic differentiation<span> is the process of development during which embryonic cells specialize and diverse tissue structures arise. Animals are made up of many different cell types, each with specific functions in the body. However, during early embryonic development, the embryo does not yet possess these varied cells; this is where embryonic </span>differentiation<span> comes into play. The </span>differentiation<span> of cells during </span>embryogenesis<span> is the key to cell, tissue, organ, and organism identity.</span>