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.
The answer is B. Water/H2O
By looking at the chart posted above, the one event that likely produced the changes in the wild plant ancestor was the mutations in wild mustard sex cells were passed on to the offspring. The correct answer choice is number 1.
