• 3 Posts
  • 163 Comments
Joined 1 year ago
cake
Cake day: July 1st, 2023

help-circle






  • SoleInvictus@lemmy.worldtomemes@lemmy.worldThis is a real photo
    link
    fedilink
    arrow-up
    20
    arrow-down
    3
    ·
    edit-2
    7 months ago

    “Vote for the lesser of two evils? Bah! I won’t vote at all!*”

    *and help the fascist who is super pro-genocide get into office. This will definitely help the Palestinians and as a Trump presidency helps the Israelis rain firey death upon them, they will die proud that I stood resolute in my convictions. Their deaths will be worth it!











  • Oh no, rate of mutation is definitely a thing and is controlled by several factors. A big one is generation time, which is what it sounds like, the time between each generation. The copying of DNA is a source of mutations. This is why many controlled experiments on evolution are done with bacteria, who have super low generation times. For example, depending on temperature, the generation of many salmonella species is around 20-30 minutes. That lets you crank out massive numbers of potential mutations, then introduce a selective pressure, like an antibiotic the species normally isn’t resistant to or an energy source it normally can’t utilize, and see what happens.

    To answer your question, yes, a higher mutation rate would confer an advantage. To a point. Most mutations are deleterious and usually lead to death, a few are benign and do nothing (at that point), and a very rare few are immediately advantageous. As long as the rate of mutation isn’t so high that the deleterious mutations combined with whatever other pressures are wiping out the population, more mutation means more chances to have the right trait to deal with a novel pressure or, very rarely, do something better.


  • To preface, I’m a microbiologist, so I have skin in the science game. I hate how these articles often have science illiterate authors or authors who are imprecise with their wording. They repeat misinformation on basic topics that science educators have been striving to correct for decades, perpetuating the cycle.

    …the study shows once again how evolution throws up multiple solutions to basic problems…

    In this case, it’s the “mysterious force of evolution that whips up solutions to problems”. Evolution doesn’t create solutions. There is no guiding force behind evolution.

    Evolution through natural selection selects for existing solutions that were generated randomly through mutation, increasing the frequency of that trait because those without either die or are outcompeted. What happens if a trait is required for survival but no organisms have it? They all die. That’s why over 99% of all multicellular species that have ever lived on Earth are extinct. If you include microbes, make that 99.99999%.


  • SoleInvictus@lemmy.worldtoScience Memes@mander.xyzCFCs
    link
    fedilink
    English
    arrow-up
    15
    ·
    edit-2
    8 months ago

    It’s not. I’m guessing they did a Google search, looked at a few misleading article titles, and then decided they were a scientist.

    On average, the hole has been shrinking, but 2023’s hole was the 12th biggest on record. The eruption of Hunga-Tonga was thought to be the main factor.

    The mass die-off reference likely refers to penguin chicks dying because climate change is causing sea ice to melt earlier than before. The poor little guys are falling into the ocean and drowning. It’s not ozone layer related, though