De que bioma se compone la mayor parte de la parte de norte america

América del Norte se clasifica ampliamente en seis biomas principales, a saber, el bioma de la tundra, el bioma del bosque de coníferas, el bioma de la pradera, el bioma del bosque caducifolio, el bioma del desierto y el bioma de la selva tropical. Bioma de la tundra. El bioma de la tundra se caracteriza típicamente por condiciones climáticas adversas, falta de vegetación de hoja perenne y permafrost (suelo congelado).

Explanation:

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The answer is an enzyme.

When cutting DNA, scientist uses enzymes called restriction enzymes. These enzymes are naturally produced in bacteria as a defense against phages. So, enzymes cut DNA of the phages and thus inactivate it. Also, these enzymes do not cat DNA randomly, but on specific sites. This characteristic of restriction enzymes is used for some molecular biology techniques. All species' DNA contains target sites of restriction enzymes, but most organisms do not have restriction enzymes. Therefore, restriction enzymes are suitable for different techniques.