Answer:
Most attenuated vaccines are viral, some are bacterial in nature. Examples include the viral diseases yellow fever, measles, mumps, and rubella, and the bacterial disease typhoid
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I'm pretty sure it's answer D. It's the only answer choice that really makes sense.
It helps scientists improve on research and tests/examinations to understand the object a little more. For Example: The newer modified microscope helps zoom into harder to see microrganisms. So if technology changed then most of our scientific knowledge wouldve been mistaken this whole time. We wouldnt know many things if technology didnt exist.
Answer:I will be pilot anyways I know one there is a commensalism between a dolphin and the birds where the birds push the fish to the top of the water column and then the birds push the fish down to the dolphins I will be pilot
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