A class was performing an experiment to discover the pH values of some common household substances. The results of three groups are shown in the table below.
Substance
Lemon juice
Vinegar
Baking soda
Milk of magnesia
Group 1 pH
2.2
2.8
Group 2 pH
2.2
2.8
8.5
Group 3 pH
2.1
8.2
8.4
10.2
8.4
10.2
10.3
Which statement best describes evidence that Group 3's data are less valid than the data for the other two groups ?

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.

meiosis is the correct answer