Bacteria are tremendously successful unicellular organisms, yet all large organisms are multicellular. Unicellular organisms cannot grow very large because the -
a respiratory rate would be too high
b diffusion of nutrients into the cell's interior would be too slow
c energy expenditures would be too great
d locomotion of the organisms would be too slow
(jefferson lab)

Respuesta :

because the diffusion of nutrients into the cell's would be too slow(B)