In the field of histopathology, the tissues to be observed under the microscope are cut in very thin slices. The thin slices make the tissue transparent, and thus, it becomes easier to observe the internal structures and accurately diagnose a disease. The tissues slices cut for the observation are generally not more than 3 micro meters in their thickness.
Hence, the answer is 'to make the tissues transparent and easier to observe'.
<span>The eventual result of diffusion is equilibrium. The concentrations prior to this point would be uneven. The solutes then diffuse from areas of high solute concentration to areas of low solute concentration. After diffusion, at equilibrium, the concentration will be even in different areas.
In addition Diffusion will eventually result in a homogenous mixture. The concentration of the mixed species will be constant throughout the mixture.</span>
Cyanobacteria play an important role in the biosphere by converting atmospheric nitrogen into mineral nitrogen directly assimilated by other organisms. This capacity is of fundamental importance in coral reefs where nutrients are scarce.
Moreover, Cyanobacteria are the micro-organisms of choice for humans in various branches of biotechnology because of the many families of molecules that they produce and which have an interest in valorization.
