A novel fungicide is introduced and widely applied to cereal crops. After five y

Question

A novel fungicide is introduced and widely applied to cereal crops. After five years, resistant genotypes of the fungal pathogen are detected at a frequency of about 1%: resistance is widely distributed across the pathogen's range. Within two years, these have become so common that the fungicide becomes worthless. Explain how this pattern can be explained by the basic features of natural selection. Include in your answer: A brief description of what natural selection is. The conditions that must be met in order for natural selection to occur. How natural selection explains the scenario above.

Explanation / Answer

according to Darwin in natural selection process, the organisms try to adapt to their environment in order to survive and produce more offspring.

for natural selection, there must have a pressure. in this case, in order to survive, they have to develop resistance to that fungicide. those who survived, they passed their resistance gene to the offsprings and those who are not resistance to that fungicide died.

in this case nature selects those who are capable and resistant to the fungicide. after five year there was only 1% who were resistant and after two more year the fungicide are of no use because all are resistant to it.

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