Hayley Gorsuch

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Biology is the study of all living organisms (plants, animals, microorganisms) and how they interact with each other and their environment. It examines the structure, classification, function, growth, origin, evolution, and distribution of all living things.

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Zooxanthellae are unicellular, golden-brown algae (dinoflagellates) that live either in the water column as plankton or symbiotically inside the tissue of other organisms. The most common symbiotic association is with hard, reef-building (or hermatypic) corals, although zooxanthellae can also be found living inside the tissue of soft corals, jellyfish, giant clams and nudibranchs.

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Macroalgal species are divided among three large groups that are named according to the colour of their dominant photosynthetic and accessory pigments: red (Rhodophyta), green (Chlorophyta) and brown (Phaephyta).