How many phylum are there in vertebrate and invertebrates ?

vertebrate is 12 point plus 728

and invertebrates is 34 point plus 268

the fossil record provides evidence of a common ancestor to many species.

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.