Phylogenetic system of classification is based on:

Explanation

Certainly, here's an explanation of each of the options you mentioned in the context of phylogenetic classification:1. **Morphological Features**: This aspect of classification is based on the physical characteristics of organisms, such as their shape, size, structure, and other visible traits. Taxonomists use these features to group organisms that share similar physical characteristics into the same taxonomic category. For example, animals with backbones are classified as vertebrates based on their morphological feature of having a spinal column.2. **Chemical Constituents**: Some organisms have distinct chemical compounds or constituents that are unique to their group. These chemicals can be used for classification. For instance, the presence of specific chemical compounds in the cell walls of bacteria, like peptidoglycan, is a key feature used to differentiate between two major groups of bacteria, the Gram-positive and Gram-negative bacteria.3. **Floral Characters**: Floral characters are specific to plants and refer to the characteristics of their flowers. These characters can include features like petal number, arrangement of floral parts, and other flower-related traits. Botanists use floral characters to classify plants into various taxonomic groups, including families, genera, and species.4. **Evolutionary Relationships**: This is a fundamental concept in phylogenetic classification. Instead of focusing solely on superficial characteristics, phylogenetic classification aims to group organisms based on their evolutionary history. It considers the genetic and ancestral relationships between species. This approach often involves the use of molecular data, such as DNA and RNA sequencing, to construct phylogenetic trees that depict the evolutionary connections between different organisms.Phylogenetic classification is primarily concerned with understanding the evolutionary history and genetic relationships between organisms, making it a more accurate and dynamic system of classification compared to classifications based solely on superficial features.