Answer:
The ecoregion stretches 2,000 km west-to-east, and 1,000 km north-to-south, across the Arctic Ocean north of Norway and Russia. It covers the island groups of Svalbard (Norway), Franz Josef Land (Russia), Severny Island (Russia), and Severnaya Zemlya (Russia).
Explanation:
The answer is D. multiple alleles
Cancer cells can form in practically any area of the body, but the main feature that unites all cancer cells is that they divide and replicate without end, until large tumors form.
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DNA, RNA AND or genetic molocules