Answer:
The macronucleus is the centrer of all metabolic activities of the organism.
Explanation:
<span>Phylogenetic tree is a tree that shows the evolutionary relationships between several species or other entities that are believed to have a common ancestry. A phylogenetic tree is a form of a cladogram.
In addition, a phylogenetic tree serves to determine the minimum number of divisions necessary to obtain a specific cell or tissue. From here, you can study, for example, the mutations generated throughout the process.</span>
I would say, C. Because an controlled variable is an experimental element which is constant and unchanged throughout the course of the investigation.
