The relation between the unfertilised egg and the blastoderm which arises from it is not made altogether clear by Schwann.
On a subsequent occasion many other flowers were fertilised with their own pollen, and all fell off dead in a few days; whilst some flowers on the same raceme which had been left simply unfertilised adhered and long remained fresh.
Moreover the caterpillars raised from these unfertilised eggs "possessed far less vitality" than those from fertilised eggs.
The writer found that we can produce this membrane in the unfertilised egg by certain acids, especially the monobasic acids of the fatty series, e.
It is, for instance, well known that the majority of marine animals lay their unfertilised eggs in the ocean and that the males shed their sperm also into the sea-water.
For the eggs of certain animals membrane-formation is all that is required to induce a complete development of the unfertilised egg, e.
If we put unfertilised eggs of a sea-urchin into sea-water which contains a trace of saponin we notice that, after a few minutes, all the eggs form the typical membrane of fertilisation.
The experiments were made on the fertilised and unfertilised eggs of the sea-urchin, and yielded the result that for the lowering of temperature by 1 deg C.
Thus the unfertilised eggs of the sea-urchin Strongylocentrotus purpuratus of the Californian coast begin to develop when membrane-formation has been induced by treatment with a fatty acid, e.
In all cases in which the unfertilised egg has been treated in such a way as to cause it to form a membrane it begins to develop.
It should be realised that all the proper, medical methods of controlling pregnancy consist, not in destroying an already growing embryo, but in preventing the male sperm from reaching the unfertilised egg cell.
Unfertilised ovum of an echinoderm (from Hertwig).
Spitzka has seen a blastoderm form in unfertilised ova of the toad-fish (Batrachus tau).
In all these cases there are two X chromosomes in the oocytes (and somatic cells) of the female, and after reduction the female gametes or unfertilised ova are all alike, having a single X chromosome or group.
In the ants, bees, and wasps the unfertilised ovum always develops into a male, the fertilised into a female.
The queen bee naturally and regularly lays a certain number of unfertilised eggs, and these produce, not females as do the unfertilised eggs of plant-lice, etc.
In these cases the hatching of unfertilised eggs is not known to occur in a state of nature, although it probably occurs occasionally.
Taking two lots of unfertilised eggs adhering to slips of paper, as laid by the mother moth, it is found that those gently brushed will hatch, whilst those not brushed will either not hatch at all, or in very small number.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "unfertilised" in a variety of sentences. We hope that you will now be able to make sentences using this word.
