Answer:
Phylogenetics
Explanation:
An evolutionary tree can also be called a phylogenetic tree, or a just a phylogeny, and phylogenetics is the study of determining evolutionary relationships, or patterns of descent of organisms.
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The aspect of his experimental process which is most important for obtaining reliable results is repeating his data collection many times.
Answer:
The blood vessel from lungs to heart is pulmonary vein which carries oxygenated blood.