Answer:
p53 helps the cells from passing on mutations that lead to DNA damage. Hence, it is known as the guardian angel of the cell as it helps fight against cancer. However, if p53 becomes defective or missing, then the mutations will lead to cancer.
Mutations in the p53 can also cause the tumor-suppressing genes to convert into tumor causing genes. Hence, mutations in such kind of genes can be very harmful for the body.
Answer:
a) Two reasons why polythene bags are not environment friendly are as following:
- Plastic bags are made up of non-renewable materials such as polypropylene and their manufacturing and disposal cause greenhouse gases to release in the environment and contribute to global climate change.
- Polythene bags or Plastic bags are non-degradable and break into small pieces in the environment which are then consumed by wildlife or run off into oceans.
b) Yes, the decision of using paper bags is correct as it will minimize the use of plastic bags and also reduce the environmental pollution caused by plastic waste. Paper bags can be reused or recycled again and again and they are easily degradable in the environment causing very less or no pollution.
c) The values associated with the ban on use of polythene bags is to establish a sustainable environment for our present and future generation. It will reduce environmental pollution and will minimize the effect of global warming.
Answer:
to allow waste to exit the cell
Explanation:
Answer:
B. cell membrane and cytoplasm
Explanation:
They both have cell membrane's and cytoplasm.
