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  • Plants and animals are easy to tell apart. This is a plant and this is an animal -- but

  • THIS is BOTH!

  • Hey animals and nearby listening plants, Trace here for DNews, thanks for tuning in!

  • If you look back to middle school science, you might remember Kingdom, Phylum, Class,

  • Order, Family, Genus, Species. Easy to remember because, Kids Playing Chicken on Freeways

  • Get Smashed. Kingdom has five groups, Monera, Protista, Fungi, Plante, Animalia, but it

  • was invented by humans, so sometimes there are exceptions to every rule. To be a plant,

  • an organism has to make it's own food and have cell walls. To be an animal you acquire

  • nutrients by ingestion and don't have cell walls. There's more to it, but that's the

  • basic distinction. This distinction goes even deeper.

  • As biologists have looked into the genes that make up the DNA of our planet's organisms,

  • classification has gotten... *eeeahhhhh* let's just say fuzzy. In this case, two studies

  • published in the journal Genome Research describe the way microRNA affects plants and animals

  • differently. Animals, like humans, have microRNA which float around the cell nucleus activating

  • and deactivating genes. It's a little technical on HOW, but in essence: animal microRNA affects

  • how DNA and RNA express genes. This helps organisms adapt to changing diets, environmental

  • stimuli and so on. Though, while animal microRNA affects lots of different gene expressions,

  • plant RNA is far more specific.

  • The sea anemone is classified as an animal, because its DNA is similar to a vertebrate,

  • it gathers food and does not have a cell wall, but its microRNA behaves as a plant! Go home

  • nature, you're drunk.

  • This isn't the only Plantimal out there that gives the biologists a nerdgasm // Plantimal!

  • It's a thing now, I want all the credits // A 2007 study from University Of Kalmar in Sweden

  • found some species of algae which were plantimals ... they dubbed them mixotrophs because they

  • can produce energy from sunlight, like a plant, but they EAT other things, like an ANIMAL!

  • Another is the Mesodinium chamaeleon which sounds like a fancy lizard, but it's actually

  • a single-celled organism. It EATS OTHER THINGS -- so animal -- but it can use the things

  • it's eaten and live off THEIR photosynthesis while it's inside its body -- until the prey

  • is digested. Presumably that's why it's called a chameleon, because depending on whether

  • it's eaten green or red algae it will change color.

  • The process of eating something and using it, evolved 2 BILLION years ago. It's called

  • endosymbiosis. When the first single celled animals ate bacterium, the prey cell became

  • part of the predator cell -- this is how we got mitochondria! Many single-celled organisms

  • flirt with the animal-plant boundary line depending on their needs and adaptations...

  • biologists are total frenemies with them... remember frenemies? Haha, so dumb.

  • The sea anemone is significant, because it's multi-cellular, and the gene regulation is

  • similar to that of a fruit fly, which means there's likely a common link between human,

  • fly and sea anemone 600 million years ago.

  • I think maybe plants and animals are part of a thinner line... like fruits and vegetables...

  • what do you think?

  • Put your thoughts down below and subscribe. Thanks for watching DNews today.

Plants and animals are easy to tell apart. This is a plant and this is an animal -- but

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某物怎麼會是植物和動物呢? (How Can Something Be A Plant And An Animal?)

  • 123 17
    Morris Du 發佈於 2021 年 01 月 14 日
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