Not enough info, but I'd go with:
B) hydrogen peroxide
When a plant is left in dark for several hours, it does not get sunlight. Isn't it?
When a plant does not get sunlight, it cannot prepare food for itself , i.e, photosynthesis does not take place. When it does not prepare food in the form of starch, it will test negative for it.
hope it helps!
Cirrus is a genus of atmospheric cloud generally characterized by thin, wispy strands, giving the type its name from the Latin word cirrus. Classification: Family A(high level)
I believe it should be 94%.Normal arterial oxygen is approximately 75 to 100 millimeters of mercury. Values under 60 mmHg usually indicate the need for supplemental oxygen. Low blood oxygen is known as hypoxemia. Normal pulse oximeter readings usually range from 95 to 100 percent. Values under 90 percent are considered to be low.
Explanation:
slope(m)=tana,where a is angle made by particular line in x- increasing sense.for a=90, m becomes infinitely large which can be termed as undefined.
