The answer is B. Precipitin Test.
Answer:
the two or more things that combined together is called compound.
Explanation:
example:
when the element NA and CL combine together form compound NACL.
C. There <span>are</span><span> </span><span>seasons</span><span> </span><span>on Mars. </span>
Those are calles spikes that are made usually of glycproteins. Those glycoproteins attach to receptors in the cell membrane of the host cell to trick it into letting the virus in.
