II and III only. The Cambrian Period is the first geological time period of the Paleozoic Era. And the longest unit in geological time is the supereon.
<span>Water-soluble vitamins are much more easily stored in the body, but they are only required up to a certain amount. Anything extra is secreted or excreted. Fat-soluble vitamins, on the other hand, are stored in the body when an excess is taken in: this can lead to a toxic level in some instances.</span>
Carbon enters the geosphere through the biosphere when dead organic matter (such as peat or marine algae) becomes incorporated into fossil fuels like coal and organic-matter-rich oil and gas source rocks, and when shells of calcium carbonate become limestone through the process of sedimentation briefly described above.
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Meiosis is the process of reduction of diploid cells to haploid cells and it involves two process meiosis 1 and meiosis 2.
Meiosis 1 involving the crossing over of the genetic material between the pair of chromosomes whereas meiosis 2 involves the separation of the chromosomes into sister chromatids.
There are two known gene products, RNA and protein.
The regulation of gene expression is important because in different moments of human deveopment different substances are needed and also during the stable fase of human development (adulthood) necessities are dieverse.
The regulation of gene expression is what makes cells and an tissues different and that is why it's also so important.
This question is indeed not east. Hope I suplied enough information according to your needs (there is still way more info on the subject).
Hope it helped,
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