Answer:
rise over run
Explanation:
rise refers to the number of units going u or down a graph
run refers to the number of units going left or right
it is seen as so;
,
, or 
Don't panic when I included "delta". Delta, it refers/means the small mathematical triangle found beside the rise and run symbols of y and x
Answer
cutting or incision
for example: gastrotomy means a surgical incision to the stomach
If I'm not mistakened, the answer is D
Hope this helps :)
Answer:
because not every virus or disease has the same DNA or RNA
Neither matter or energy is created or destroyed, it is simply reused.