If you compare the chromosomes of a cell as it enters interphase with the same chromosomes just before the cell begins mitosis, a key difference would be . a. the number of different kinds of chromosomes that are present b. whether or not homologous pairs of chromosomes are present c. whether or not the chromosomes have been duplicated d. the total number of chromosomes that are present

b. read the phase at the intersection of any given temperature and pressure.

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.