People with type o blood are considered "universal donors" for transfusions because people with type o blood are considered "universal donors" for transfusions because they usually have very strong red blood cells their red blood cells lack a and b surface antigens their blood lacks a and b antibodies their blood is plentiful in a and b antibodies

Most common blood type... Red blood donors

b - the respond is innate and varies over time.

good luck!

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.