Which of the following statements are true regarding passive transport? Choose 2 answers:
Simple diffusion, a type of passive transport, requires the use of membrane proteins.
Carbon dioxide can pass through a cell membrane via passive transport.
Oxygen cannot enter a cell through passive transport.
Charged ions cannot pass through a cell membrane via passive transport.

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.