Answer:
Periodic selection.
Explanation:
Some bacterial strain has the ability to develop the resistance against the particular drug. This helps the bacteria to survive against the adverse environmental conditions.
The periodic selection may be defined as the natural selection that selects some strains of the bacteria that can survive in the particular environment. The periodic selection also favors the adaptive mutation that might occur due to the recombination in bacteria and removes the non selective species. The information given in the question provides the example of periodic selection.
Thus, the answer is periodic selection.
The first step in the development of a complex organism is the establishment of a pattern of cells with different states that can differentiate along different pathways. … [P]atterning processes require signalling between and within cells, leading ultimately to gene activation or inactivation. Such a process can lead to reliable patterns of cell activities only if all the cells have the same set of genes and obey the same rules<span> [</span>
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The enzyme becomes denatured when this occurs.
If I answer it then its not in your own words…...
