| OCR Text |
Show 197 19. There the environment due in vitro 20. Attempts to of cent to tissue the on the and to osmotic of equal potassium ratio of Since of prevent coats egg Due about the probably and serosal number of of In and sensi of the suggested. the to entry of the of maintenance, and its genetic plasticity, its in development. small experimental size studies. and on the less a A 0.9 per percentage serves to efficient mecha- ions. nature ease studies but excess general than mechanism which regulative egg less effect different from the in various 0.9 per cent NaCl. NaCl ions ions. embryonic tissues of a cuticle small hatching 7:3 the associated with and wide a patterns, in between easily achieved concentrcltions may be nism to enced is unsuccessful. were is significantly loss useful for the exchange This chorion. was pressure to prevent eggs, the culture percentage be no 24. water to there hatching at of vitelline membrane solutions, have impermeability dechorionated eggs Based 23. water embryo. The considered sodium to little developing embryo. study permeability the 22. is of hatching permeable salt the apparently the to 21. are and part utilized tivity is the this of its developmental ready availability organism is quite Major disadvantages the of are difficulty experi- |
