Which patterns of life were established during the time of the Umm an-Nar culture that still exit today pleas help me I ran out of poinst:(
Option 3
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C. Permafrost
Permafrost is the layer beneath the "active layer". The active layer consists of soil that freezes and thaws every year. However, the requirement for permafrost is that it be frozen for two or more years consecutively. This is why permafrost exists in cold environments such as tundras.
Answer:
B. Premature stop codon mutation
Explanation:
