Bone marrow may be source of new egg-cell generation in adult mammals ❋ Unknown (2005)
It is possible for a female robot to be implanted with a human egg-cell that can be fertilized internally by a human male, and for her to nourish that cell in the laboratory of her body and birth it in the human fashion, becoming a surrogate mother to his child. ❋ Anthony, Piers (1987)
Remak's greatest service was that he put the germ-layer theory in direct relation with the cell-theory by demonstrating the cellular continuity from egg-cell to tissue, and by showing that each germ-layer possessed distinctive histological characteristics. ❋ Unknown (N/A)
The egg-cell _is_ the organism in an undeveloped state; it has a vastly more complicated structure than was possessed by the primordial cell from which its race has sprung, and it can in no way be considered the equivalent of this ancestral cell. ❋ Unknown (N/A)
Parthenogenesis, or the development of an embryo from an egg-cell without the latter having been fertilized, has been described in species of _Thalictrum_, _Antennaria_ and _Alchemilla_. ❋ Various (N/A)
Under all conditions, the sex is determined by a struggle for the mastery in the egg-cell, between the energy of that egg-cell and the energy of the male spermatozoon. ❋ Louis Dechmann (N/A)
Polyembryony is generally associated with the development of cells other than the egg-cell. ❋ Various (N/A)
In a species of _Allium_, embryos have been found developing in the same individual from the egg-cell, synergids, antipodal cells and cells of the nucellus. ❋ Various (N/A)
Of the human egg-cell and the Graafian follicle the aborigine is not likely to know anything, nor can he know that the mother lodges the thing corresponding to the eggs of birds. ❋ Alexander F. Chamberlain (N/A)
Under all conditions, the matter of sex is determined in the egg-cell at the moment of fertilization. ❋ Louis Dechmann (N/A)
All differentiations of his body, from the first differentiation of the egg-cell into a complexity of cells up to the last formation of his organs, take place in the same gliding development. ❋ Rudolf Schmid (N/A)
The egg-cell in fern reproduction -- becoming the oöspore when fertilized. ❋ George Henry Tilton (N/A)
These, as in Gymnosperms, are of two kinds, microspores or pollen-grains, borne in the stamens (or microsporophylls) and megaspores, in which the egg-cell is developed, contained in the ovule, which is borne enclosed in the carpel (or megasporophyll). ❋ Various (N/A)
If this be the case there can be no real recapitulation in ontogeny of the phylogeny of the race, for the egg-cell represents not the first term in phylogeny, but the last. ❋ Unknown (N/A)
This in spite of the fact that the tiny paternal germ-cell is the only medium of transmission of the paternal qualities, while the mother furnishes the much larger egg-cell, and feeds him throughout the embryonic period. ❋ Henry Stanton (N/A)
This egg-cell is differentiated, after fecundation, in gradual and imperceptible transitions, farther and farther, higher and higher, until the individual has reached its perfect organization. ❋ Rudolf Schmid (N/A)
The gametophyte or prothallial generation is thus extremely reduced, consisting of but little more than the male and female sexual cells -- the two sperm-cells in the pollen-tube and the egg-cell (with the synergidae) in the embryo-sac. ❋ Various (N/A)
From the former spring small, active, spiral bodies called ántherozòids, which lash about in the moisture of the prothállium until they find the archegònia, the cells of which are so arranged in each case as to form a tube around the central cell, which is called the òösphere, or egg-cell, the point to be fertilized. ❋ George Henry Tilton (N/A)
It is generally known that human beings result from the union of an egg-cell and a sperm-cell, but it is not so universally understood that these germ-cells are part of a continuous stream of germ-plasm which has been in existence ever since the appearance of life on the globe, and which is destined to continue in existence as long as life remains on the globe. ❋ Paul Popenoe (1933)
