Loeb's continuation of his experiments on the action of various salts on unfertilized eggs will naturally be awaited with great interest.
We have already noticed his success in causing unfertilized eggs of the sea-urchin to develop into normal individuals as far as the pluteus stage.
Here is, for instance, a view of a fertilized and an unfertilized section of one of our experiments in Georgia.
In conclusion, there was shown a slide of the yield of nuts from an experimental tract of a commercial orchard of about 20 acres, in which the yield from a fertilized acre was compared with the yield from an unfertilized acre.
It was noted that the unfertilized acre gave a yield of approximately two barrels, whereas the fertilized acre gave an increase of two bushel baskets more than the unfertilized.
The yields of these trees cannot here be taken up but, in general, these fertilized trees came into bearing earlier and have yielded double and treble the number of nuts produced by the unfertilized trees.
But any closer interpretation of this function of the semen is rendered nugatory in advance by this, that it is in some cases the male and in others the female that results from the unfertilized ova.
Janosik has found segmentation in the unfertilized eggs of mammalians.
Professor Loeb has found that the unfertilized egg of the sea-urchin may be made by chemical treatment to produce thrifty young, and he thinks it probable that the same effect may be produced among the mammalia.
In some plants the ovary is divided into several compartments or cells, each with one or more ovules, which are only immature or unfertilized seeds, often very tiny, but usually quite easily seen if the ovary is cut open.
But in this case, as the stigma is unfertilized by foreign pollen, its own performs that service.
Producing males from unfertilized eggs, as certain wasps and bees.
As they have no male ancestors, it seems probable there was in the germ-plasm of some queen bee, at a time far back, some change which allowed unfertilized eggs to produce males.
The drones are derived from unfertilized eggs; yet their instincts are those of the male, not of the female.
What is the difference between the appearance of the nucleus of the fertilized and the unfertilized egg?
When the unfertilized eggs of purpuratus are put for two hours into hypertonic sea water (50 c.
This author assumes that the unfertilized egg cannot develop because it contains too much CO{2} but that the CO{2} can escape from the egg as soon as its permeability is increased through the destruction of the cortical layer of the egg.
This is intelligible on the assumption that the unfertilized egg contains only one X chromosome while the spermatozoon carries into the egg the second X chromosome.
Conklin has established the existence of a definite structure in the unfertilized eggs of Ascidians, Amphioxus, and many molluscs.
In all cases the results of the isolation of the first blastomeres seem to agree with the demonstrable structure of the unfertilized egg.
Soon afterward this was accomplished by other methods for the unfertilized eggs of a large number of marine animals, such as starfish, molluscs, and annelids.
But the unfertilized egg is not homogeneous, on the contrary, it has a simple but definite physicochemical structure which suffices to determine the first steps in the differentiation of the organism.
He observed that when unfertilized eggs of the Californian sea urchin Strongylocentrotus purpuratus are put for from one and a half to three minutes into a mixture of 50 c.
If, however, the solution is subsequently diluted with sea water or if the egg that was in this mixture is washed in sea water, the same sperm mixture in which the egg previously remained unfertilized will now fertilize the egg.
In bees it had been shown many years ago by Dzierzon that the males develop from unfertilized eggs while the females, queens and workers, develop from fertilized eggs.
Against this view might be quoted the fact that the unfertilized eggs sometimes laid by the workers (imperfect females) of bee and ant communities always develop into drones.
The eggs which produce drones or males differ from those which produce queens and workers in being unfertilized, the queen having the power to lay either fertilized or unfertilized eggs.
In a few species, too, young are produced parthenogenetically, that is, are produced from unfertilized eggs.
This wingless female, called the stem-mother, lays unfertilized eggs or more often perhaps gives birth to live young, all of which are similarly wingless females which reproduce parthenogenetically.
In 1908 the unfertilized land produced nine-tenths ton of clover, while land treated with farm manure produced three and two-tenths tons per acre.
As an average of these twenty-four years, the addition of mineral plant food produced increases in crop yields above the unfertilized land as follows: Corn increased forty-five per cent.
The average yields on the unfertilizedland were: 32.
It does [530] not fall off after the fading away of the flower, as unfertilized ovaries usually do; neither does it grow out, nor assume the upright position of normal capsules.
Unfertilized eggs when developing into embryos are equivalent to buds, separated from the parent-plant and planted for themselves.
There are species of gall-fly in which males are unknown, the unfertilized eggs always developing into females.
In two Lepidopterous genera (Psyche and Solenobia) the unfertilized ova give rise mainly, if not entirely, to females.
Only females of Neuroterus are found, and they lay unfertilized ova in peculiar galls which develop into Spathegaster baccarum.
In Bees, Wasps, and a Sawfly (Nematus ventricosus) the unfertilized ova give rise to males.
The sense of smell is thus delicate enough to distinguish the fertilized from the unfertilized female, and has associated with it a sense of direction by which the insect is guided to the right spot.
The queen can lay either fertilized or unfertilized eggs.
There is nothing improbable in this latter assumption, and one is even inclined to inquire why such growth does not take place in all unfertilized eggs.
At all events, it is obvious that it is an advantage that an unfertilized sexual egg shall not be lost to the organism.
The fertilized female lives some days, and the unfertilized female over a week (Speyer).
Such development does not take place in all the eggs laid by an unfertilized female, but only in part, and generally a small fraction of the whole, while the rest die.
It is a good fact that the increase alone from the nitrogen applied is more than twice the total yield of the unfertilized land during the last thirty years, and he does well who holds fast this fact.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "unfertilized" in a variety of sentences. We hope that you will now be able to make sentences using this word.
