biolgy AS paper 1 question

hey ...can someone explain why the answer for this question is D

What is not a limitation of an electron microscope?
A Electrons do not travel far in air so the whole system must be in a vacuum.
B The electron beam cannot penetrate far into biological material.
C The typical specimen viewed in a vacuum must be dehydrated.
D There is an increase in resolution and magnification compared with the light microscope.

Reply 1

dobson123

Original post by alyoan tariq

A - It's in a vacuum so the specimen must be dead. This is a limitation because living processes can't be see.

B - This is a limitation because the specimen needs to be thin which makes preparation more complex.

C - If the specimen is dehydrated it's organelles could be damaged and therefore harder to see.

D - This is the right answer because it is the only one that is not a limitation

:smile: