This process happens when the water around it is too warm
there are 4 chromosomes in the sex cells of each fly
Plants remove carbon dioxide from the atmosphere, and release oxygen into the atmosphere. Humans and animals remove oxygen from the atmosphere, and release carbon dioxide into the atmosphere.
Cells are not simple structures at all. They have numerous organelles and serve numerous functions working together with millions of other cells. They are highly complex machines on their own that are combined with other highly complex machines to build anything, from smallest to largest organisms. For some unicellular ones they even do other things that cells in multicellular organisms don't.