Asked in Genetics
If a flatworm is cut in half and grows into two flatworms is it sexual reproduction or asexual reproduction?
It is asexual reproduction when a non-parasitic flatworm (planaria) loses its tail and thereby spawns a new planarian. This regeneration can occur with any lost body parts using its adult stem cells. A bisected worm will grow into two "individuals" (although they will be genetically identical, like clones). Planaria are hermaphroditic and normally reproduce sexually. A planarian's eggs can be fertilized by its own sperm or by the sperm of another planarian.