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Montano1993 [528]
3 years ago
9

The allele that causes an altered form of hemoglobin (Hb) occurs in all human populations as a result of mutation. In some popul

ations, this allele has increased in frequency because it confers some resistance to malaria. Which process of evolution is likely responsible for the change?
Social Studies
1 answer:
andreyandreev [35.5K]3 years ago
5 0

Answer:

Natural Seleccion

Explanation:

As natural selection proposes, organisms that adapt to their environment are more likely to survive and transfer the genes that aided to their survival success to the next generations.

Since this allele causes a form of hemoglobin that confers resistance to malaria, subjects that posses higher levels of this type of allele tend to survive more to a malaria than people that don't posses this form of allele, and pass on the genes to the next generations, in this case the allele, causing the Hb frequency to increase.  

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Answer:

C. Earthquake

Explanation:

Han dynasty was known as one of the most devastating period in Chinese agricultural history. The country experiences series of natural disasters that destroyed a lot of Their agricultural lands.

It started from deforestation ordered by the empire in order to make various equipment's and infrastructure for the military's.

Trees have the ability  prevent sediment runoff which can hold a huge amount of water. During the period of heavy rain, the amount of water that can usually sustained by the forest were let loose and came down to the citizens' resident. Destroying a lof of their farms in the process.

After that, the han dynasty had to deal with the exact opposite situation, when the country undergone some period of drought when very little rainfall happen. This also caused a lot of crop failures due to inability to fulfill the crops' water needs.

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slava [35]

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Alexeev081 [22]

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