Answer:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Explanation:
20.9 percent
Around 78% of the air is nitrogen gas, and only 20.9% is oxygen.
Hope this helps.
B
the answer is b ill give you your points back if its wrong
Answer:.4.Microorganism X might not be linked to floppy ear disease, because the inoculated mouse remained healthy.5.Microorganism X modified its cell wall structure while being cultured, and is no longer infectious to rabbits.6.A laboratory mouse might not be an appropriate, susceptible host; an experiment with a laboratory rabbit may be needed.
An immune disorder is a malfunction of the immune system. Immune disorders are often caused by inherited mutations or even acquired from someone else. Immune disorder can cause infections to different parts of the body and misdevelop the internal organs.
