With the photos in her hands, the fertilized eggs were a thing of the past.
The segmentation of the fertilized nucleus results in the formation of a number of nuclei which arrange themselves around the periphery of the egg and, the protoplasm surrounding them becoming constricted, a blastoderm or layer of cells, enclosing the central yolk, is formed.
While thus carried about by the host-insect, the female is fertilized by the free-flying male, and gives birth to a number of tiny triungulin larvae.
The male possesses elaborate copulatory structures of a chitinous nature, and the eggs are fertilized in the female without even quitting the place where they are formed on the wall of the reticular gonocoel.
Sprengel came very near to appreciating the meaning of cross-pollination in the life of plants when he states that "it seems that Nature is unwilling that any flower should be fertilized by its own pollen."
The body of a vascular plant is developed in the first place by repeated division of the fertilized egg and the growth of Develop- the products of division.
For new varieties the flowers should be fertilized with a view to combine, in the seedlings which result from the union, the desirable qualities of the parents.
Males in nearly all species appear once a year, when the last female generation, the ovigerous generation, is fertilized, and a few large ova are produced to carry on the continuity of the species over the winter.
The offspring of the virgin females are in most of these instances females; but among the bees and wasps parthenogenesis occurs normally and always results in the development of males, the " queen " insect laying either a fertilized or unfertilized egg at will.
During pairing he thrusts the tip of these organs into the seminal vesicles of the female and the eggs are fertilized as they pass out of the oviduct.
9), violent and ecstatic exercises, ceremonial acts of bowing and kissing, the preparing of sacred mystic cakes, appear among the offences denounced by the Israelite prophets, and show that the cult of Baal (and Astarte) included the characteristic features of heathen worship which recur in various parts of the Semitic world, although attached to other names.5 By an easy transition the local gods of the streams and springs which fertilized the increase of the fields became identified with 2 Compounds with geographical terms (towns, mountains), e.g.
Here the eggs are fertilized and here they segment so that the young embryos are formed within their mother's 9 body.
C, Transverse section of the The eggs of Limulus are fertilized in the sea after they have been laid.
The eggs are fertilized, practically in the ovary, and develop in situ.
Whatever value is to be attached to Mendel's observation of the breaking up of self-fertilized hybrids of cultivated varieties into the two original parent forms according to the formula " 'PP, 2PN, INN," it cannot be considered as more than a contribution to the extensive investigation of heredity which still remains to be carried out.
Of Their causes are extremely difficult to trace in detail, but it appears that they are largely due to a " shaking up " of the living matter which constitutes the fertilized germ or embryo-cell, by the process of mixture in it of the substance of two cells - the germcell and the sperm-cell - derived from two different individuals.
Weismann has also ingeniously argued from the structure of the egg-cell and sperm-cell, and from the way in which, and the period at which, they are derived in the course of the growth of the embryo from the egg - from the fertilized egg-cell - that it is impossible (it would be better to say highly improbable) that an alteration in parental structure could produce any exactly representative change in the substance of the germ or sperm-cells.
Only a small proportion of these get fertilized, and still fewer ever emerge from the egg.
Diameter), containing a fertilized ovum surrounded usually by many yolk-cells.
The fertilized ova, provided with yolk and a shell, are next transferred to the "uterus" along which they travel to the exterior.
The egg consists of a fertilized ovum and a mass of yolk-cells.
The female is fertilized by the male and three or four days later lays a single egg - the winter egg - and then dies.
Only in order not to put the layer of soil fertilized by the sheep beyond reach of the plant.
The general view was, that the embryo originated in the ovule, which was in some obscure manner fertilized by the pollen.
It may, however, well be that the capacity for wintering in the dry state has physiologically replaced the need for resistent fertilized eggs.
- Early Stages of division of the Fertilized Egg-cell in Nassa mutabilis.
As each city or district had its own Ba'al, the author of its fertility, the " husband " (a common meaning of ba'al) of the land which he fertilized, so there were many Ba'als, and the Old Testament writers could allude to the Ba`alim of the neighbouring Canaanites.
Flowers, generally speaking, are either self-fertilized, cross-fertilized or hybridized.
In wind-fertilized plants the flowers are comparatively inconspicuous and devoid of much attraction for insects; and their pollen is smoother and smaller, and better adapted for transport by the wind, than that of insectfertilized plants, the roughness of which adapts it for attachment to the bodies of insects.
In Peronospora, Saprolegnia, &c., the ends of the branches swell up into sporangia, which develop zoospores in their interior (zoosporangia), or their contents become oospheres, which may be fertilized by the contents of other branches (antheridia) and so form egg-cases (oogonia).
Fertilized egg with the central uninucleate cell (o) surrounded by the oosphere and the fertilizing periplasm (p).
The I, Oogonium (og) with the an5, Fertilized oogonium sur theridial branch (az) applied rounded by two layers of to its surface.
Concerning the second question, the recent investigations of Buchner ascogenous hyphae with their asci represent the sporophyte since they are derived from the fertilized ascogonium.
Mycelium ircdospores otachY' ar Mycelium aecidi'spores teleutospores (young) - mycelium SporoNtyte with conjugate nuclei GametohyEe with single nuclei teleutospores ?(mature) 8a ?; sporida ?m celium erm $ fertile cells Y sp (abortaitviae) (of aecidium) fertilized cells (of aecidium) and bears the basidiospores.
This remarkable double fertilization as it has been called, although only recently discovered, has been proved to take place in widely-separated families, and both in Monocotyledons and Dicotyledons, and there is every probability that, perhaps with variations, it is the normal process in Angiosperms. After impregnation the fertilized oosphere immediately surrounds itself with a cell-wall and becomes the oospore which by a process of growth forms the embryo of the new plant.
By the segmentation of the fertilized egg, now invested by cell-membrane, the embryo-plant arises.
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.
Thus in Erythronium and Limnocharis the fertilized egg may form a mass of tissue on which several embryos are produced.
The oosphere is in all cases fertilized while still within the oogonium, the antherozoids being admitted by means of a pore.
Coleochaete sp., fertilized egg tion.
The fertilized egg charged with food reserves rests for a considerable period, surrounded by its cortex, the whole having assumed a reddish-brown colour.
Suddenly the attraction ceases, and the oosphere is fertilized, probably at that moment, by the entry of a single antherozoid into the substance of the oosphere; a cell-wall is formed thereupon, in some cases in so short an interval as five minutes.
The first effect of fertilization is the occlusion of the trichogyne from the fertilized carpogonium.
The filaments arising from the carpogonia grow into long thin tubes, which fuse with special cells rich in protoplasm contents; and from these points issue isolated tufts of sporogenous filaments, several of which may form the product of one fertilized female cell.
In Naccaria, one of the Gelidiaceae, it is observable that the ooblastema filament, as the tube arising from the fertilized carpogonium has been called, fuses completely with a cell contiguous to the carpogonium before giving rise to the foraging filaments already refered to.
Polysiphonia sp., transverse section through a branch, and at spores arising from fertilized carpogonium.
Even among Bangiaceae the carpospores arise from the fertilized cell by division, while in all other Rhodophyceae the oospore, as it may be called, gives rise to a filamentous structure, varying greatly in its dimensions, epiphytic, and to a large extent parasitic upon the egg-bearing parent plant, and in the end giving rise to carpospores in the terminal cells of certain branches.
The doubling process is provided by the act of fertilization, where an antherozoid with the single number of chromosomes fuses with an oosphere also with the single number to provide a fertilized egg with the double number.
He finds that eight chromosomes appear in karyokinesis in the ordinary thallus cells, but sixteen in the gonimoblast filaments derived from the fertilized carpogonium.
This individuality is the result of the particular selection of qualities it receives from its parents, a selection that obviously differs in different cases, as, save in the case of "identical twins," which are supposed to be the product of a single fertilized ovum, no individual pair of brothers, or pair consisting of brother and sister, are alike.
They enacted the story of his birth and life and death; the Earth, the Mother, is fertilized only by an act of violence by her own child; the representative of the god was probably slain each year by a cruel death, just as the god himself died.
The summer crops (millet, sesame, figs, melons, grapes, olives, &c.) are fertilized by the heavy " dews " which are one of the most remarkable climatic features of the country and to a large extent atone for the total lack of rain for one half the year.
Dzierzon (181119(36) in 1848, it has been believed that the queen bee lays fertilized eggs in cells appropriate for the rearing of queens or FIG.
Dickel and others have lately claimed that fertilized eggs can give rise to either queens, workers or males, according to the food supplied to the larvae and the influence of supposed "sex-producing glands" possessed by the nurse-workers.
They have two fertilized eggs and they want final consent.
At this point, abandoning the two fertilized eggs might be a worse sin.
Serere, to sow), the fertilized ovule of plants.
The fertilized egg-cell (oospore) forms a filamentous structure, the proernbryo, from a restricted basal portion of which one or more embryos develop, one only as a rule reaching maturity.
It has frequently been noted that even well-fertilized plants upon good soil will mature only 15 or 20% of the bolls produced.
The thin-walled eggs are often termed "summer-eggs," the fertilized ones "winter" or "ephippial" eggs (by parity with the phyllopod Entomostraca, q.v.).