When a baby is born, these processes occur. 1 breaking of the amniotic sac 2 contraction of muscles in the uterus wall 3 cutting of the umbilical cord In which order do these processes usually occur? A) 2 → 1 → 3 B) 2 → 3 → 1 C ) 3 → 1 → 2 D) 3 → 2 → 1

1. desertification

2. captive breeding

3. black rhinoceros

4. renewable resources

explanation:

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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.