Hitherei thinkthe answeris1
<span>for accurate results, for example when they are making vaccines, these are weakened harmful or disease causing viruses,, too little of the virus then it would not be a vaccine or simply would not build you antibodies, and too much of it would not also not a vaccine since it will already inflict a disease or possibly be fatal</span>
Answer:
D
Explanation:
A) Water that falls from the clouds towards the ground, especially as rain or snow.
B) The continuous movement of water on, above and below the surface of the Earth.
C) When plants or animals create offspring.
D) a recurring process where dead plants decomposes and provides nutrients to the soil that are absorbed by plant roots, making more plants grow.
Hope that helped :)
A unicellular or single celled organism is the term for organisms composed of only one cell.
I hope this helped!
