One thing that still confuses me about the evolutionary process is the transition of things like laying eggs to giving live birth, or evolving lungs to replace gills. Why don't we see a lot of weird transitional species that don't classify with the rest of animal kingdom? Can someone explain?

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Anonymous Wed Aug 31 13:05:58 2016 No.8311543 [Reply] [Original]

One thing that still confuses me about the evolutionary process is the transition of things like laying eggs to giving live birth, or evolving lungs to replace gills. Why don't we see a lot of weird transitional species that don't classify with the rest of animal kingdom? Can someone explain?

>>	Anonymous Wed Aug 31 13:07:15 2016 No.8311549 Marsupials kind of fit that bill.

>>	Anonymous Wed Aug 31 13:15:09 2016 No.8311571 >>8311549 I don't get it, what's so special about marsupials?

>>	Anonymous Wed Aug 31 13:21:09 2016 No.8311585 Lots of sharks give birth by keeping the egg inside them instead of laying them. http://www.iflscience.com/plants-and-animals/shark-giving-birth-caught-camera/

>>	Anonymous Wed Aug 31 13:24:42 2016 No.8311595 File: 30 KB, 540x960, 1471672174687.jpg [View same] [iqdb] [saucenao] [google] >>8311543 >what is ovoviviparity >what are lungfishes

>>	Anonymous Wed Aug 31 13:30:52 2016 No.8311613 >laying eggs >keep eggs inside, eggs hatch inside body >never lay the eggs at all, organism develops inside body it's a pretty clear progression senpai

>>	Anonymous Wed Aug 31 13:34:01 2016 No.8311620 File: 398 KB, 1280x963, IMG_2461.jpg [View same] [iqdb] [saucenao] [google] >>8311543 Humans have eggs too. It's called the amniotic sac. It hatches right before birth.

>>	Anonymous Wed Aug 31 13:42:19 2016 No.8311640 File: 68 KB, 310x338, 0018.jpg [View same] [iqdb] [saucenao] [google] >>8311620 >that picture >mfw

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/sci/ - Science & Math