The right answer is A.
Meiosis is an important process in many organisms:
In angiosperms, plants with flowers, meiosis occurs for the production of cells of pollen grains (gametes, haploid cells).
In animals, meiosis is important because it is the mechanism of gametogenesis that produces eggs (oogenesis) and sperm (spermatogenesis).
In the fungi, meiosis produces spores, which by mitosis will give a haploid generation.
Regulation of opening and closing of stomata
The system is called Taxonomy and was made by Swedish botanist Carlous Linnaeus
The answer is A. macromolecules
There are 4 types of macromolecules; lipids, proteins, carbs and nucleic acids