Abstract
ABSTRACT The changes in total nitrogen and in deoxyribosides (DNA) have been followed during starvation of the planarian worm, Polycelis nigra. It was found that total nitrogen content after 60 days had been reduced to about 14 per cent, of its initial value. It is not possible to exclude with certainty the occurrence of any DNA loss, but it is clear that the loss, if any, is much smaller than the loss in nitrogen. The implications of these results for previous morphological investigations of the effects of starvation on planarian worms are discussed.
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