A dichotomous key is defined as a biological tool for identifying unknown organisms to a particular taxonomic level. It is constructed with many levels and series of couplets.
So, by observing the given dichotomous key, it is concluded that the correct answer is Option A- Organism X and Z have at least one observable trait in common in this dichotomous key.
C precipitation because if you look at the diagram, you will see it is raining on the mountains.
Blood Type A and Blood Type B are co-dominant traits. They do not dominate each other, rather they combine to form blood group AB. This is only possible if both the blood groups are pure.
It might involve changing to survive different temperatures such as when lakes freeze over or a lake is too hot.
