Asexual freshwater planarians reproduce by tearing themselves into two pieces by a process called binary fission. The resulting head and tail pieces regenerate within about a week, forming two new worms. ... Because planarians stop “doing it” at the slightest disturbance, this remained a centuries-old puzzle.
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Asexual freshwater planarians reproduce by tearing themselves into two pieces by a process called binary fission. The resulting head and tail pieces regenerate within about a week, forming two new worms. ... Because planarians stop “doing it” at the slightest disturbance, this remained a centuries-old puzzle.