Answer:
20
Explanation:
during meiosis the number of chromosomes is split in half
I believe it’s rat fish and octopus but I’m not completely sure
Only one sound blocking material should tested at once and the sound will vary on how much and what kind of materail you use.
The electrons that chlorophyll loses in the electron transport chain are replenished by water molecules. These water molecules degrade releasing oxygen and hydrogen, the electrons are then supplied to the electron deficient chlorophyll molecules located in the reaction centre of the Photosystem.
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.
