Sponges are thought to be very simple organisms. “They have no heart, lungs, stomach, or nerves.” Or are they really simple…
“An experiment was done in which the sponge tissue was pressed through a fine mesh; this broke the sponge into individual cells. Amazingly, the sponge cells rejoined, forming a whole sponge!”
Check it out in this linked video, but notice that scientists “infer” that this is how single cells evolved into more complex organisms. Inferences like this, though, are assumptions not evidence.
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