It was like memory t- cells which basically are the brains of the immune system,this way if a disease strikes,the next time it strikes the immune system knows what to do and what to protect like vital organs a virus may attack
Answer:
C
Explanation:
it takes a few months before you can detect the virus in the blood and at that stage the symptons apear because the virus gas taken over
Answer:
A term applied to hard rocks, or <u>igneous and metamorphic rocks</u> that are distinguished from sedimentary rocks because they are typically more difficult to disaggregate. Well cemented sedimentary rocks are sometimes described as being hard, but are usually called soft rock.
My best guess would be D. many studies have linked cardiorespiratory exercise to the lowering of blood pressure. (Many studies have also linked going vegan to the lowering of blood pressure, too :)
