Roughage, also known as Dietary Fiber is the indigestible part of a plant.
The reason why people might worry about introducing new species in Albany is the same reason people might be worried to introduce a new species everywhere: it can replace the local species, thus it would be a thread to the biodiversity on Earth.
For example, seeds could fly away from the roof and the plant would start growing on the field nearby.
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Fisher, Wright, and Haldere were all pioneers of population genetics
Sexual Reproduction: Sexual reproduction promotes genetic variation by producing different gene combinations. Meiosis is the process by which sex cells or gametes are created. ... The genetic recombination of genes also occurs during crossing over or the swapping of gene segments in homologous chromosomes during meiosis.