What do red blood cells, white blood cells, and platelets have in common?
all are part of lymph.
all are produced in the bone marrow.
all are involved in destroying pathogens.
all are self-secreting hormones.

All are produced in the bone marrow.

Explanation:

Edge 2021

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.

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