. Biology; the story of living things. THE INTKHDEI'llNDENCE OF MV|\(; ril|\(;s M. A. 1'. .sV((/i CtinserrniUin iJcpl Stickleback and nest. Of what advantage would this be to the species? mals survive this dangerous stage, their chances of growing to adults are very considerable. Although parental care is not associated with plants, nevertheless in low forms of plant lif(> locomotor stages occur, called zoospores or swarm spores, by means of which the plants gain footholds in new areas. Many devices have already been men- tioned by means of which seeds are scattered far from the parent plan
. Biology; the story of living things. THE INTKHDEI'llNDENCE OF MV|\(; ril|\(;s M. A. 1'. .sV((/i CtinserrniUin iJcpl Stickleback and nest. Of what advantage would this be to the species? mals survive this dangerous stage, their chances of growing to adults are very considerable. Although parental care is not associated with plants, nevertheless in low forms of plant lif(> locomotor stages occur, called zoospores or swarm spores, by means of which the plants gain footholds in new areas. Many devices have already been men- tioned by means of which seeds are scattered far from the parent plant. In higher plants, hard shells, spiny coverings, or inedible pulp protect seeds within the mature fruit, thus giving greater ojjpor- tunity for the scattering and germination of seeds. Adaptations for the protection of young are more evident among animals. In crustaceans, the larvae of which form the chief food for great numbers of fish, there are not a few protective adaptations. In some instances crustaceans have brood pouches in which the young are kept, or, as in the case of crayfish and lobster, the developing eggs are cemented to the abdominal appendages of the mother and carried around by her. The male bullhead .swims arountl with and broods over his young, while the male sea horse has a brood pouch in which the young are held. In some worms and crustaceans, the eggs may be retained in the burrow of the parent, or they may be held in the mantle cavity or a space similar to it, as in the fresh-water mussels, barnacles, and tunicates. Some spiders, notably the wolf spiders, carry the egg cocoon about with them and when the yoimg are hatched, they are carried on the backs and legs of the female. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hunter, George W. (George William), 1873-1948; Walter, Herbe
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Keywords: ., bookauthorwalterherberteugeneb1867, bookcentury1900, bookpublish
