B. is the correct answer. It makes sense too because vaccines are usually inserted in a vein, which is where the bloodstream is. With all of this medicine in your body, the virus will come into the body, the body will recognize what the virus is, sending out the antibodies from the vaccine into the bloodstream and all around, then the virus is dead. :)
Answer:
i think its bcz
ATP if formed by deeply folded membrane
So if the membrane is smooth instead of folded
it will affect the ATP production
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Im not that sure with the answer</h2>
Water goes downhill and the earth isn't Very spherical so it'll have ways for the water to go down and up to distribute the water around the world.
The answers are B and C because the other 2 are unhealthy
