Chrysophytes
Chrysophytes are protists that resemble plants and are typically found in freshwater and marine habitats with low calcium. Diatoms (Bacillariophyta), Golden-brown algae (Chrysophyceae), and Yellow-green algae are the three main categories of chrysophytes (Xanthophyceae). While the majority of chrysophytes are unicellular and free-swimming, others, like the dinobryon shown above, group together and form colonies. Chrysophytes have approximately 1000 identified species, yet due to their diversity, none of them shares a single-cell structure. While some species are amoeboid without any cell walls, others have cellulose cell walls that are reinforced by silica compounds.
Chrysophytes
The practice of classifying organisms based on shared characteristics is known as biological classification. The two kingdoms of classification were proposed by Linnaeus. He divided organisms into two kingdoms: the animal world (Animalia) and the plant kingdom (Plantae). The two kingdom classification had some drawbacks, such as the inability to distinguish between eukaryotes and prokaryotes, unicellular and multicellular species, and photosynthetic and non-photosynthetic organisms. As a result, this field underwent further development, with R.H. Whittaker’s Five Kingdom classification serving as the primary example.