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The contractile vacuole is predominant in species that do not have a cell wall, but there are exceptions (notably Chlamydomonas) which do possess a cell wall. Through evolution , the contractile vacuole has typically been lost in multicellular organisms, but it still exists in the unicellular stage of several multicellular fungi , as well as in ...
Marine algae can be divided into six groups: green, red and brown algae, euglenophytes, dinoflagellates and diatoms. Dinoflagellates and diatoms are important components of marine algae and have their own sections below. Euglenophytes are a phylum of unicellular flagellates with only a few marine members. Not all algae are microscopic.
Thus, to Barcroft homeostasis was not only organized by the brain—homeostasis served the brain. [13] Homeostasis is an almost exclusively biological term, referring to the concepts described by Bernard and Cannon, concerning the constancy of the internal environment in which the cells of the body live and survive.
The sea anemone benefits from the products of the algae's photosynthesis, namely oxygen and food in the form of glycerol, glucose and alanine; the algae in turn are assured a reliable exposure to sunlight and protection from micro-feeders, which the sea anemones actively maintain. The algae also benefit by being protected by the sea anemone's ...
The largest cells, Chattonella marina, produced up to 100 times more superoxide than most other marine algae (see figure in [49]). The authors suggest that since ROS is produced as a byproduct of metabolism, and larger cells are more metabolically active than smaller cells, it follows that larger cells should produce more ROS.
The spores of freshwater algae are dispersed mainly by running water and wind, as well as by living carriers. [83] However, not all bodies of water can carry all species of algae, as the chemical composition of certain water bodies limits the algae that can survive within them. [83] Marine spores are often spread by ocean currents.
Being able to regulate our body functions can enable a freer and more independent life, scientists say.
Marine life, sea life or ocean life is the collective ecological communities that encompass all aquatic animals, plants, algae, fungi, protists, single-celled microorganisms and associated viruses living in the saline water of marine habitats, either the sea water of marginal seas and oceans, or the brackish water of coastal wetlands, lagoons ...