I believe that the answer to your question would be A. Heart Begins.
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.
<span>lactose Hope i helped :)</span>
Pros:
Increase in safety.
Less traffic.
Reduced emissions.
Cons:
Eye-contact
Judgement Calls
Snow
Legal Responsibility
Cost
Lack of Trust
<u>There are many more, these are just a few.</u>
