Final answer:
Phylogeny can be partially determined from anatomy, but it is not the only factor considered. Genetics and molecular analyses are also used to determine the evolutionary relationships among organisms. It is important to consider both homologous and analogous structures, as well as additional evidence, when constructing a phylogenetic tree.
Step-by-step explanation:
Phylogeny is the study of the evolutionary history and relationships among organisms. While anatomy can provide important clues for determining phylogeny, it is not the only factor considered. Morphological characteristics and the fossil record were traditionally used to determine phylogenetic relationships, but modern phylogenetics also incorporates genetic and molecular analyses. Organisms that share similar physical features and genetic sequences are generally more closely related. However, it is important to consider both homologous structures (similarities due to common evolutionary paths) and analogous structures (similarities due to separate evolutionary paths), as well as additional evidence, when determining phylogeny.