Order the following from the simplest (smallest) structure on top to the most complex on the bottom: beta cells, pancreas, epithelial tissue, nucleus, endocrine system, and human.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

the correct answer in apex is tissue development, i know because i just had this question

answerhomologous structures;