Diffusion of ions across membranes through specific ion channels is driven by . Group of answer choices ion concentration gradients only ion electrochemical gradients active transport pumps electrical gradients only

The correct choice is ''ion electrochemical gradients''.

Diffusion of ions across membranes through specific ion channels is driven by ion electrochemical gradients.  

Explanation:

An electrochemical gradient can be considered as that electrical (electrostatic pressure) and chemical (diffusion) force that determine the movement of molecules and ions across the membrane. This electrochemical gradient, in addition to causing movement of substances through cell membranes, is also a type of potential energy available for the performance of different cellular activities, potential energy called membrane potential.

fabric is silk wool ext. paper isnt

explanation:

u cant make fabric out of paper cause paper comes from wood while fabric comes from animals

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: