How to Use alga in a Sentence

alga

noun
  • The secret to photosynthesis passed to the alga and all its heirs.
    Elizabeth Kolbert, The New Yorker, 6 Dec. 2021
  • In Florida and Texas, red tides are caused by an alga called Karenia brevis.
    Tom Metcalfe, NBC News, 13 July 2019
  • Namely, a safe place to hide from predators and a source of food in the form of small, single-celled alga that grow on red seaweed plants, reports Erik Stokstad for Science.
    Sarah Kuta, Smithsonian Magazine, 29 July 2022
  • Near the back, leaning on the vase, is an alga from an herbarium of strange, incredible shapes, which could have been invented by Max Ernst.
    Louis Benech, WSJ, 28 Mar. 2020
  • In high tide, when less light reaches the alga, the crystals may capture some of the sunlight and pass it on to the surrounding chloroplasts for photosynthesis.
    Kai Kupferschmidt, Science | AAAS, 13 Apr. 2018
  • Once the water temperature returns to normal, any polyps that haven’t starved to death will host another alga.
    Erik Stokstad, Science | AAAS, 8 Dec. 2020
  • Yet here in this massive pool swirls more than a million liters of Nannochloropsis, a salt-loving alga that flourishes on the brackish water pumped from below.
    Amy Nordrum, IEEE Spectrum, 30 May 2018
  • And seaweed is really just an extremely large alga—in fact, seaweeds are also called macroalgae.
    Caroline Delbert, Popular Mechanics, 16 Mar. 2020
  • By looking at frozen samples under an electron microscope, scientists were able to zero in on nanostructures in the alga’s cells that are about 1000 times smaller than a human hair is thick.
    Kai Kupferschmidt, Science | AAAS, 13 Apr. 2018
  • The lagoons are home to a variety of microorganisms, including Dunaliella salina, an alga responsible for the red hue.
    Washington Post, 10 Dec. 2021
  • The consequent flood of data is helping researchers determine which genes are behind a coral’s, an alga’s or a bacterium’s fragility or resilience.
    The Economist, 15 Mar. 2018
  • This alga is a critical food source for brine shrimp and other salt-tolerant species, which attract migratory shorebirds.
    Washington Post, 10 Dec. 2021
  • For example, since the 1960s, scientists have shown that a type of alga shows a daily cycle in its photosynthesis, even without a nucleus.
    Ed Yong, Discover Magazine, 16 May 2012
  • This is the first recorded example of an alga practicing an aquatic equivalent to pollination.
    Jack Tamisiea, Scientific American, 28 July 2022
  • Yet the verdant spheres are a different organism altogether: Chlorella, an alga that occasionally takes refuge within the confines of the paramecium’s cushy cell membrane.
    Quanta Magazine, 7 June 2021
  • In return, the bacterium processes nitrogen gas into ammonium, which the alga needs.
    Ashley P. Taylor, Discover Magazine, 22 Sep. 2012
  • Studies of Volvox, an alga that forms beautiful, flagellated green balls, shows that multicellular organisms also found new ways to use existing functions.
    Elizabeth Pennisi, Science | AAAS, 28 June 2018
  • This distinctive form of the freshwater alga Aegagropila linnaei is exceedingly rare.
    National Geographic, 8 Sep. 2016
  • Lichens are actually two organisms working together: a fungus and either alga or cyanobacterium.
    Corryn Wetzel, Smithsonian Magazine, 17 Feb. 2022
  • This particular photograph also documents the incremental nature of the scientific method: DNA analysis has shown that people mistakenly lumped at least three alga species under the name Halymenia latifolia since that label was created.
    Leslie Nemo, Scientific American, 29 Mar. 2021

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'alga.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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