Elementary text-book of zoology, general Elementary text-book of zoology, general part and special part: protozoa to insecta elementarytextbo00clau Year: 1892 126 AND DEVELOPMENT OF IN GENEKAL. In the other cases in which the sexual and asexual forms mor- phologically resemble each other, as in Salpa, the origin of the alternation of generations may, as in the case of the origin of the dioecious from the hermaphrodite state, be traced back to the ten- dency towards the establishment of a division of labour acting upon an animal which possessed the capacity of sexual and
Elementary text-book of zoology, general Elementary text-book of zoology, general part and special part: protozoa to insecta elementarytextbo00clau Year: 1892 126 AND DEVELOPMENT OF IN GENEKAL. In the other cases in which the sexual and asexual forms mor- phologically resemble each other, as in Salpa, the origin of the alternation of generations may, as in the case of the origin of the dioecious from the hermaphrodite state, be traced back to the ten- dency towards the establishment of a division of labour acting upon an animal which possessed the capacity of sexual and asexual repro- duction. It was advantageous for the formation of the regular chain of buds (stolo prolifer) that the power of sexual reproduction should be suppressed, and that the %%%%%%%%%%%%%%%% gonei-ative organs should be- come rudimentary and finally vanish in the budding indivi- duals; while, on the other hand, in the individuals united in the chain, the gene- rative organs Avere early de- veloped, and the stolo prolifei- was aborted and completely vanished. Special forms of alternation of generations may be dis- tinguished in which colonies are formed as the result of the asexual reproduction by fAk\ iMlo V buddinsr from a single anima'
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