Practice question · Multiple choice
Multicellularity requires somatic cells to act as evolutionary dead ends. What explains why natural selection favours cells that forfeit their own direct reproduction?
Hints
- Which lineage in a multicellular body actually passes genes to the next generation?
- How does genetic identity between body cells alter the logic of individual reproductive success?
Show the answer
D. They ensure the transmission of their shared genome via the germ line
Why
Selection acts on the shared genetic lineage; somatic cells propagate their genes indirectly through germ cells. Confusing somatic sacrifice with tissue longevity or assuming cells regain fertility overlooks how division of labour strictly separates propagation from maintenance.
Practise From Single Cells to Multicellular Bodies
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