9. based on the diagram above, which of the labeled constituents carry oxygen from the lungs to other cells in the body?

d
c
b
a

The answer is label A which is Red blood cell (RBC).

Explanation:

Oxygen from the alveoli of the lungs diffuses into the capillaries and are carried by the RBC in the form of oxyhemoglobin. Near the tissues partial pressure of oxygen is less so oxyhemoglobin liberates oxygen which diffuses into the tissues.

dz nuts.   eeneneneeenenne

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.