From the question you can immediately infer that it's either B or D, as A and C basically mean the same thing and it isn't anything related to a microscope. I can tell you now that you don't need an electron microscope to see cells, they're only required for the atomic level.
Therefore, the answer is B, as you can't see cells without a microscope but you only need a light microscope, not an electron microscope.
Association between all the living things on earth
The answer is
Postural Tremor. Kinetic tremors occur during movement of a body part, such as
moving your wrist up and down. Task-specific tremors occur during a particular
activity, such as writing. A postural tremor transpires when holding a position
against gravity, such as holding your arm or leg outspread.
Answer: false
Explanation: the correct complementary strand would be ATGCAA
