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garri49 [273]
3 years ago
14

When a new viral infection appears in a population, scientists usually try to develop a vaccine against the virus. Which substan

ces would most likely be contained in the new vaccine?
A. live bacteria that ingest viruses
B. white blood cells from an infected individual
C. weakened viruses associated with the infection
D. a variety of microbes that will attack the virus
Biology
1 answer:
sladkih [1.3K]3 years ago
3 0

Answer:

weakened viruses associated with the infection

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Answer:

Physical Change:

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Chemical Change:

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- photosynthesis

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- Nuclear power [atoms are arranged differently]

- Smashing paper with two metal balls, burns paper

- Electricity in water, breaks H2O into H2 and O2

-----

physical change is when there is only physical change occurring--and it can typically be undone easily,

whereas chemical change is when there is chemical change--which changes the chemical properties of something, which cannot be undone simply.

hope this helps!!

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2 years ago
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4 years ago
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<u>-TheUnknownScientist</u>

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