Essays about: "multicellularity"

Found 4 essays containing the word multicellularity.

  1. 1. Assessing the relationship between hypoxia and life on Earth, and implications for the search for habitable exoplanets

    University essay from Lunds universitet/Geologiska institutionen

    Author : Thomas Evan Smith; [2022]
    Keywords : hypoxia; hypoxia-inducible factors; atmospheric oxygen; multicellularity; embryogenesis; exoplanets; white dwarfs; oxygen fugacity; Earth and Environmental Sciences;

    Abstract : Atmospheric oxygen at the level of present-day Earth (21%) is generally regarded as permissive for the development and survival of complex multicellular life, such as animals. The hypothesis that oxic conditions are conducive for multicellular life has subsequently been applied to the search for life elsewhere in the universe, with planets exhibiting atmospheric oxygen of a similar level to Earth being considered as candidates for habitability. READ MORE

  3. 2. Quorum sensing och quorum quenching : bakteriers förmåga att kommunicera med varandra, och vägar att störa denna mekanism för att hämma infektion

    University essay from SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Author : Moa Therése Viklund; [2019]
    Keywords : Quorum sensing; QS; quorum quenching; QQ; QSI; bakteriekommunikation; interspecies kommunikation; AI1; AI2; autoinducerare; homoserin lakton; AHL; AIP; antimikrobiell aktivitet; resistensutveckling;

    Abstract : Den här litteraturstudien syftar till att översiktligt förklara hur bakterier kommunicerar med varandra och att sammanfatta hur mekanismen kan hämmas, med syfte att minska bakteriers virulens och förmåga att manifestera infektion. Quorum sensing är bakteriers förmåga att kommunicera med varandra och ger dem möjligheten att uppvisa en form av multicellularitet. READ MORE

  4. 3. The Effect of Photobacterium damselae Availability on the Behavior of Choanocytes in the Marine Sponge Amphimedon queenslandica

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Mathias Jönsson; [2018]
    Keywords : Biology and Life Sciences;

    Abstract : Sponges are aquatic filter feeding animals that use internal chambers comprised of choanoflagellate-like cells called choanocytes to pump and filter water. In this study I investigated the behavior of choanocytes in juvenile Amphimedon queenslandica, a coral reef demosponge, when they were fed Photobacterium damselae subsp. READ MORE

  5. 4. Changes in Arsenic Levels in the Precambrian Oceans in Relation to the Upcome of Free Oxygen

    University essay from Paleobiologi

    Author : Emma Arvestål; [2013]
    Keywords : Arsenic; Precambrian; ocean chemistry; Great Oxygenation Event; GOE; evolution of multicellularity;

    Abstract : Life on Earth could have existed already 3.8 Ga ago, and yet, more complex, multicellular life did not evolve until over three billion years later, about 700 Ma ago. READ MORE