Germs is the microorganism that causes colds most.
Physical barriers
immune system
body temp
OK so based on the options given I would like to say that the answer is A. because if you think about it logically it is the only answer that makes sense.
The microtainer/micro collection tube holds between 250 and 500 μl of blood.
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What is a Collection tube?</h3>
This is often used in the laboratory and comprises of a plastic reservoir and a lavender color-coded closure.
The microtainer/micro collection tube holds about 250 and 500 μl of blood which is used for diagnosis etc.
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