<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>
The best answer is D, birds.
For more information and details on the way a bird's respiratory system works:
https://asknature.org/strategy/air-flow-patterns-facilitate-efficient-gas-exchange/
Answer:
Eukaryota, Archaea, Bacteria
Explanation:
They are the largest taxonomic groups.
Sorry if I am wrong
Answer:
Food is broken down into nutrients.
Skeletal system
Explanation:
Answer: True?? or is it false?
