Biologists do not fully understand DNA because there are constant changes and new discoveries developing.
Answer:
C, there is genetic variation within the population
Explanation:
Compound- a new substance formed by the combination of two or more different atoms
Energy Level- area that electrons are found around an atomic nucleus
Element- a substance consisting of only one type of atom
Molecule- the smallest complete form of a compound or diatomic gas
The choice that is NOT an example of critical thinking is "implementing the first solution to a problem identified." The rest of the choices are all examples of critical thinking. The correct answer is C.