Answer: Lungs eliminating water and carbon dioxide.
Explanation: The excretory system is the body system that helps to release and eliminate waste from the body. Oftentimes, organs of some system maybe organs of another system.
The organ of the excretory system are also parts of other systems.
The lungs are part of the respiratory system however, lungs removes carbon dioxide as waste from the body thus lungs are also part of the excretory system.
Nucleoside analogs are the mutagenic chemicals that have a structure that is similar to the normal bases of the nucleotide and thus can be incorporated in the DNA during the process of replication, however as it has different base-pairing rules than the normal nucleotide base it can lead to mutations.
An example of a nucleoside analog is acyclovir which an analog of guanosine.
