As in, why did certain animals evolve to become very vulnerable for a short amount of time just to change a lot?
In: Biology
Total niche seperation between the parent and larva becomes possible.
Beetles and butterflies show this most but even cicadas are doing it. A butterfly eats nectar and caterpillars eat leaves, they will never fight for food with their parents or outcompete each other. Most beetlegrubs eat decaying wood or plant roots. Most adult beetles eat pollen or other above ground food again seperating the parents and childs foodsources. They will also not be subject to the same predators.
Avoiding competition makes the possible population higher.
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