The p53 protein is a tumor suppressor protein used for regulation of cells. if there is a mutation in the p53 protein it will no longer serve its original tumor suppressive function. so, cells that show unwanted tumor traits will not be able to get regulated by p53 so the tumor cell will continue to divide uncontrollably
I believe the answer is A.
The correct answer is : Non-native species is the example that affects biodiversity.
These species can be an agent of unacceptable economic, biological or social aftermath.
However, these species still provides in the regional biodiversity like biotic interactions and species richness and ecosystem services.