...1.INTRODUCTION Collective bargaining has been defined by different experts in different ways. Nevertheless, it is treated as a method by which problem of wages and conditions of employment are resolved peacefully and voluntarily between labor and management. However, the term collective bargaining is opposed to individual bargaining.
Definition of EMBRYO SAC. : the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization.See embryo sac defined for kids.ADVERTISEMENT. the female gametophyte of a seed plant consisting of a thin-walled sac within the nucellus that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization. See embryo sac defined for kids. ADVERTISEMENT.
The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast adjacent to the embryonic disk. This is alternatively called the umbilical vesicle by the Terminologia Embryologica (TE), though yolk sac is far more widely used.rtificially colored, showing gestational sac, yolk sac and embryo (measuring 3 mm as the distance between the + signs). The yolk sac is the first element seen in the gestational sac during pregnancy, usually at 3 days gestation.