But Prime is just one of Amazonâs subscription businesses, which now include offerings like Subscribe & Save, Amazon Instant Video, Amazon Mom and Amazon Web Services. This explosion of the subscription business model has led to a spike in mergers and acquisitions activity. Witness Facebookâs $19 billion acquisition last year of the subscription-based messaging platform WhatsApp or Charles River Ventureâs recent investment of $4 million into subscription-box company Cratejoy.
Random Chromatid Assortment. A third source of genetic diversity occurs during meiosis II, in which the sister chromatids separate and are randomly distributed to the daughter cells, the gametes. Crossing over in meiosis I leads to non-identical chromatids in meiosis II chromosomes.
A source of new variability is necessary for continued evolution to occur. Sources of genetic diversity External. Much of variation in populations, species, is retained due to changes in the environment (adaptive traits are only good in some environments, and not in others).orces decreasing population diversity. Forces increasing population diversity. Levels of weedy biodiversity within a habitat. A condition necessary for evolution to occur is that there must be genetic variation among the excess offspring produced.