Abstract
REPRODUCTION in triclads varies from asexual to complicated sexual methods1,2 both within and between species. Attempts to determine the causes of such differences resulted in controversy between students favouring the external environment3 and those favouring an internal physiological process4,5 as the determinant.
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REYNOLDSON, T. Environment and Reproduction in Freshwater Triclads. Nature 189, 329–330 (1961). https://doi.org/10.1038/189329a0
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DOI: https://doi.org/10.1038/189329a0
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