F.3 biology (hely!!!!!) 15點呀

The Diagram →→→→http://www.postimage.org/image.php?v=Pq2QCH2S

With reference to the diagram:
i. explain how it is possible to tell that this is a view using an electron rather
than a light microscope. (2 Marks)

ii. state which of the two structures A to C are found in large numbers in a
cell with a high level of metabolic activity. Give a reason for each choice.
(2 Marks)