What is the objective of mitosis? . what mechanism(s) in mitosis allow this to occur? . what is the objective of meiosis? . what mechanism(s) in meiosis allow this to occur? .

Mitosis is somatic cell division. In this division, the parent cells divide to form identical daughter cells. Mitosis is divided into different phases, Interphase, Prophase, Anaphase, Metaphase and Telophase followed by Cytokineses. 

Meiosis is the division of germ cells. In this division, the parent cells divide to form haploid daughter cells. Meiosis is divided into two stages: Meiosis I and II. Each stage contains the same phases as mitosis.

No that answer is wrong. you have written the function of mitochondria in chloroplast and function of chloroplast in mitochondria.

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants