Agar cubes

The most effective sized cube that maximized diffusion was the 1cm cube.
It was the most effective at maximizing diffusion because the sodium hydroxide didn’t have as much surface area that it had to travel through. Important factors that affect how materials diffuse into cells is cell size because as a cell grows, there is less membrane for the substance to diffuse through which means that the centre of cell will not get the substances needed. It also means that diffusion is less efficient, and the cell process slows down and the cell stop growing. Another factor is an organism being multicellular because the organism has evolved features such as gas exchange organs, circulatory system.
Cells grow not to be very large because it would increase the volume size which would cause the SA:V ratio to be smaller. If the ratio was smaller, it would mean that diffusion would be harder and less effective to maximize diffusion for nutrients and resources to pass through cell membrane.
Cube C would be the most effective at maximizing diffusion because it has more surface area and less volume that resources and nutrients must travel through. Its smaller size will allow for everything inside the middle of the cell to be affected.
Our bodies adapt surface area to volume to help exchange gases by having long and thing nerve cells along with folds in the membrane.
Certain cells can’t get to be the size of a small fish because the SA:V ratio will become smaller which will mean that the diffusion process will be less effective. The cell wouldn’t be able to function properly because it wouldn’t be able to absorb all of the materials that are trying to penetrate it
The advantages of a large organism being multicellular is that they have a faster process of diffusion which means that it can have more functions at once.

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