What effect has outsourcing many factory jobs to third world nations had on union membership within the United States? It has expanded the size of unions as more and more foreigners have joined them.
It has promoted smaller unions.
It has had no effect on the size of unions.
There is not enough information here to answer this question.

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answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation:

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.