The correct answer of the given question above would be PRECEDE AT DIFFERENT RATES OF REACTION. The features that all reactions involving enzymes have in common is that, the features precede at different rates of reaction. Hope this is the answer you are looking for.
A homologous structure is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor. In other words, it's when very different animals have bones that appear very similar in form or function and seem to be related.
The answer is C. Genetic Isolation.
Genetic isolation occurs when there is no genetic exchange between organisms of the population or species. One of the reasons that cause genetic isolation is geographical separation. The reason why some species of koalas are only found in Australia and lemurs in Madagascar is that they cannot mate with other species outside of their geographical boundary.