Due to their structure and function they are differ from each other
I think the answer is two
Water is produced when electron transport chain.
The correct answer is the second choice - peer review process in scientific research exists in order to verify that the conclusions that are made are supported by the data. You cannot make a valid conclusion if you do not have enough evidence or data to prove it - this is why your peers have to go through your research to make sure everything is done according to the rules of scientific research.
Hope this helps.
The waste products of respiration are Co2 and H20.
