Which sequence best represents the different levels of organization of multicellular organisms from least complex to most complex?

a) cell -> organ -> tissue -> organ system -> organism
b) cell -> tissue -> organ -> organ system -> organism
c) organism -> organ system -> organ -> tissue -> cell
d) organism -> organ -> organ system -> tissue -> cell

Accroding to the given squence the cell, tissue, organ, organ system, organism. Sequence best represents the different levels of organization of multicellular organisms from least complex to most complex. The reason is that the cell is the smallest or basic unit of life therefore, it is considered as least complex.

The group of cells form tissue and the tissues when accumulate then there will form an organ. After organ, the organs are gathered to make a system which is known as organ system. When the organ system is made then an organism appears so after this organisms or species form population and then community is formed by population. Different communities form an ecosystem. The ecosystem forms biosphere.

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.