Meiosis Fill the blancs 1)During Prophase I homologous chromosomes form consisting of chromatids.

2) is the process of chromosomes exchanging segments

3)Homologous chromosomes move to the middle of the cell during of Meiosis

4) results from the random alignment of chromosomes during Metaphase I of meiosis

1) During Prophase I homologous chromosomes form *tetrads* consisting of *sister* chromatids.

2) *Crossing-over* is the process of *homologous* chromosomes exchanging segments.

3) Homologous chromosomes move to the middle of the cell during *Metaphase* of Meiosis.

4) *Genetic diversity* results from the random alignment of chromosomes during Metaphase I of Meiosis.

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.