<span>They act as a barrier against toxins and other harmful things in the environment. They also are a source of nutrients that are stored. The microenvironment is also favorable due to its high level of hydration and low oxygen levels.</span>
If purple is dominant, the genotype of the purple flower could be PP or Pp, as both would give a purple colour. However, if the crossed flower turned out to be white, we could say with certainty that the genotype of the purple flower is Pp as the genotype of the white crossed flower would be pp, which would not be possible if the purple flower's genotype was PP.
The nucleus during mitosis. Micrographs illustrating the progressive stages of mitosis in a plant cell. During prophase, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down. At metaphase, the condensed chromosomes.
Hope that helped!!
-astroworld301
