1. Passive transport is one of the processes that occur at the cell membrane in a cell. Which of the following is an example of passive transport?a. food molecules entering a cell via a food vacuole formed by the membrane * B. 
water molecules entering a cell through the membrane from areas of high concentration
* C. 
potassium ions entering a cell through proteins in the membrane requiring the use of ATP
* D. 
macromolecules entering a cell through proteins in the membrane from areas of lower concentration