The highest amount of a nutrient that can be consumed without likely harm in a group of individuals of a similar age is the

a) dietary reference intakes(dri).
b) tolerable upper intake level(ul).
c) recommended dietary allowance (rda),
d) adequate intake(ai),

B

Explanation:

Tolerable Upper Intake Level is the nutrient individuals in a group of the same age can take daily in an unquantifiable amount because it has no inimical effect

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.