Red algae (Rhodophyta) are photosynthetic Archaeplastids that are mostly multicellular but include unicellular forms. They possess rigid cell walls containing agar or carrageenan, which are used as solidifying agents in food production and microbial culture media.

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Archaeplastida is a eukaryotic supergroup that includes the red algae (Rhodophyta), the green algae (Chlorophyta), another green algal group called Charophyta, and land plants.

Archaeplastida

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Green algae (Chlorophyta) are photosynthetic organisms characterized by cellulose cell walls, starch carbohydrate storage, and chlorophyll a and chlorophyll b pigments. They display diverse life forms ranging from unicellular to colonial and multicellular, which serves as a model for studying the evolution of multicellularity.

Green Algae

Charophyta is a group of green algae within the Archaeplastids that is evolutionary closest to land plants. They share land-plant-like characteristics, including cell division mechanisms, particular biochemical pathways, cellulose cell walls, starch as storage carbohydrates, and photosynthetic pigments chlorophyll a and chlorophyll b.

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