Answer: the atomic number (number of protons) order the elements.
Explanation: Each element on the Periodic Table has their own configuration of electrons. In order to have a neutral charge, there is an equal number of protons to electrons. Thus, the atomic number (number of protons) order the elements.
Mitochondria is the powerhouse of a cell so with that being said
The correct answer is "the keywords were not sufficiently narrowed".
In this example, the literature research yielded a great and unmanageable number of citations. It is practically impossible to read all these citations and most probably some of these citations are not relevant to what the nurse researcher is looking for. Therefore, this literature research needs to be conducted again, by narrowing down the focus using more precise terms.
Fossils give evidence upon organisms the past are not the same as those found and demonstrate a progression of evolution.