When transporting materials into a cell against a concentration gradient, what are the 2 things you need

Transport proteins and ATP

Explanation:

Transporting materials into a cell against a concentration gradient is active transport.

Transport proteins bind the materials to their active sites and release them the other side of the membrane.

However, it takes energy to move materials against a concentration gradient.

The cell uses the breakdown of ATP to provide the required energy.

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.