Once an egg is fertilized by a sperm, a zygote is formed. The zygote divides into multiple cells in a process known as cleavage, triggering the beginning of embryonic differentiation. ... Cells in these three layers will give rise to different parts of the organism. The endoderm eventually becomes the gut.Mar 3, 2011
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The southerly lowlands of the island average around 0 °C<span> (</span>32 °F) in winter, while the Highlands of Iceland tend to average around −10 °C<span> (14 °F). The lowest temperatures in the northern part of the island range from around −25 to −30 °C (−13 to −22 °F). The lowest temperature on record is −39.7 °C (−</span>39.5 °F<span>).</span>
Mitocondria, the power house of a cell.