In examining a cell using the electron microscope, you see a structure that is composed of two membranes, contains numerous pores, and appears to be connected to a network of membrane-enclosed compartments. The structure you are observing is most likely the nuclear envelope.

Explanation:

c. heat from the poles back down towards the equator.

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.