Why is myxoma no longer effective in controlling rabbit population?

The development of resistance to the disease has taken different courses. In Australia, the virus initially killed rabbits very quickly – about 4 days after infection. This gave little time for the infection to spread. However, a less virulent form of the virus then became prevalent there, which spread more effectively by being less lethal. In Europe, many rabbits are genetically resistant to the original virus that was spread. The survival rate of diseased rabbits has now increased to 35%, while in the 1950s it was near zero.[15]

Hares are not affected by Myxomatosis, but can act as vectors.[16

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the answer is

c. parental

cell division is not regulated in tumor cells.