What is the best definition of diffusion?

random movement of molecules across a concentration gradient until the difference in concentration between two regions is near zero

a process in which molecules move across a semipermeable membrane until the number of molecules of water is nearly equal on both sides

net movement of molecules across a permeable membrane bilayer that requires transport proteins

the exchange of solute molecules across a permeable membrane from areas of high concentration to areas of low concentration

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

Apatient has an open displaced fracture of the second cervical vertebra. this is her fifth visit and the fracture is healing normally. what icd-10-cm code is reported?

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water