Evolution can both add and remove junk DNA. Humans are descended from bacteria.
From bacteria that lived a long time ago. Not from those that live today that had many iterations to optimize themselves. Different bacteria species can also much better exchange genes with each other than vertebrates that need viruses to do so.
Implying that humans evolved from the kind of bacterias that are around today might be more wrong than saying that the bacteria we see know evolved from humans. There more evolutionary distance between todays bacteria and those from which humans descended and humans and those bacteria from which they descended.
Yeah, and there are often bacteria in a single flower pot that are less related to each other than you are to the potted plant. But both bacteria still have a much smaller genome than you or the plant, maybe because genome size matters for reproduction speed for them, but is insignificant for us.
From bacteria that lived a long time ago. Not from those that live today that had many iterations to optimize themselves. Different bacteria species can also much better exchange genes with each other than vertebrates that need viruses to do so.
Implying that humans evolved from the kind of bacterias that are around today might be more wrong than saying that the bacteria we see know evolved from humans. There more evolutionary distance between todays bacteria and those from which humans descended and humans and those bacteria from which they descended.
Yeah, and there are often bacteria in a single flower pot that are less related to each other than you are to the potted plant. But both bacteria still have a much smaller genome than you or the plant, maybe because genome size matters for reproduction speed for them, but is insignificant for us.