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Comment on YSK - All song birds on the planet are descended from ancestors in Australia.

Hawke@lemmy.world ⁨23⁩ ⁨hours⁩ ago

There’s a single origin for everything. It doesn’t matter how many times the descendants of that common ancestor have diverged and reconverged.

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acockworkorange@mander.xyz ⁨23⁩ ⁨hours⁩ ago
You’re talking about a different subject than me.

There’s no consensus for what you’re saying.

1: You’re talking about whether a common ancestor exists for all life, I’m talking about common ancestor for a trait (e.g. tree bark, bird song, these are traits and not organisms).

2: There’s current debate on whether life emerged multiple times or if it was only once. There’s evidence for both and it’s not a settled debate.
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- Hawke@lemmy.world ⁨22⁩ ⁨hours⁩ ago
  If that’s so, then that’s not what you said. You said “plants keep evolving into trees”. While it’s true that we give the name “trees” to a variety of plants with different genetics, all of them share a common ancestor: otherwise they wouldn’t be plants but something else.
  
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