A because yeast do alcholic fermatation in bread when you bake and some bacterias prokayotes live off it.
Genes are the segments of DNA transferred from parents to offspring
Cells, the basic unit of life, are derived from spontaneous generation.
So, if the birthrate and the death rate are the same, that means that for every person that gets born, one person dies: so the number of people would stay constant. This means that the growth rate is actually 0%.
