The chloroplasts within algae differ in the number of membranes they contain, indicating their evolutionary lineage. 

Algae Chloroplasts

Algae have complex cell structures containing different structures of chloroplasts. 

Algae are autotrophic protists that can be unicellular or multicellular. They  are responsible for about 70% of the oxygen production in aquatic environments.

"Plant-Like" Algae

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

Supergroups of Algae

Algal blooms are dangerous high concentrations of toxins that impair liver and nervous-system function in aquatic animals and humans produced by quickly growing algae populations. 

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