Obviously the mutations are decided within the seed, and the culture of young plants from them had no other aim than that of ascertaining what had occurred in the field.
Thousands of mutations may perhaps take place yearly among the plants of our immediate vicinity without any chance of being discovered.
Today I have only to show that the mutations of the evening-primroses, though sudden, comply with the demands made by Darwin as to the form of variability which is to be accepted as the cause of evolution and as the origin of species.
Two cases of sudden mutations have come to my knowledge, producing this same anomaly in allied species.
The mutationsproceed in all directions, as I have pointed out in a former lecture.
In nature the dying out of unfit mutations is the result of the great struggle for life.
And to this it should be added that really progressive mutations have hardly been observed in horticulture.
Horticultural mutations are as a rule very rare, especially in genera or species which have not yet been brought to a high degree of variability.
Small linear petals occur as a specific character in Oenothera cruciata of the Adirondacks, but have been seen to arise as suddenmutations in the common evening-primrose (O.
The theory of mutations is a starting-point for direct investigation, while the general belief in slow changes has held back science from such investigations during half a century.
The mutations take place in nearly all directions.
Therefore I shall have to show that mutations do yield new and constant forms, while fluctuations are not adequate to do so.
Any mutations in a wrong direction would at once be destroyed, but an accidental change in a useful way would be preserved, and multiply itself.
And if mutations in groups, or such periodic mutations should be the rule, it is to be premised that these periods recur from time to time, and that many species must even now be in mutating condition, while others are not.
In the case of the peloric toad-flax the mutationsare so numerous that they seem to be quite regular.
Furthermore the different causes for the sundry mutations must lie latent together in the same parent-plant.
This power has greatly changed its configuration, and the process of these mutationsis daily going on.
It is, however, of a loose, though hard and shelly character; and has, in the geological mutations of the island been chiefly demolished and washed away.
I am perfectly willing to admit all thesemutations of taste, but there is something deeper than that.
Mr James Croll has recently strongly supported this opinion; and there can be no doubt that we have here a vera causa of considerable mutations of level.
These views were gradually modified, and some of them entirely abandoned, in proportion as observations were multiplied, and the signs of former mutations more skilfully interpreted.
Changes caused by Man We are best acquainted with the mutations brought about by the progress of human population, and the growth of plants and animals favored by man.
It must not be imagined that, in the above sketch of the occurrences of a short period, I have given an account of all, or even the greater part, of the mutations which the earth has undergone by the agency of subterranean movements.
In the art of government a new principle seemed to have arisen, that of adopting and guiding public opinion, which, in the mutations of civil and political society, had emerged as from a chaos.
In the awful mutations through which society had been passing, some had been silently favourable to the queen's views.
Why these mutations arise: what leads to the surmised unequal division of the gametes: of this we know practically nothing.
Nor until we can induce the production of mutations at will are we likely to understand the conditions which govern their formation.
The whole world was to him a Reporter's district, and all human mutations plain matters of news.
The only idea that seemed to remain stationary, and not liable to the mutations into which all the others were every moment gliding, was the colour of the body, which was that of the green medium in which he lay.
His ideas and feelings seemed to be operated upon by the same power that ruled the mind of the maiden; for his face followed, in its changing expressions, the mutations of her countenance.
Flora Bannerworth, I am one who has witnessed time's mutations on man and on his works, and I have pitied neither; I have seen the fall of empires, and sighed not that high reaching ambition was toppled to the dust.
The other is the supposed faculty of the organism to keep, to store, and to transfer those variations or mutations of a not properly adaptive sort which, though originating by chance, happen to satisfy some needs of the organism.
One could hardly say that the recent investigations about the production of mutations by *external* means have strengthened their importance for the general theory of transformism.
Of course, the inheritance of mutations would imply a certain sort of “inheritance of acquired characters,” on the condition stated in the preceding note.
The distinguished botanist Hugo de Bries (of Amsterdam) gave an interesting lecture at the scientific congress at Hamburg in 1901 on "The Mutationsand Mutation-periods in the Origin of Species.
It would appear that no cause for the mild temperature of the Cretaceous needs to be invoked, other than those mutations of land and water which the geological deposits themselves indicate.
The crowning fact in his favor is that through all the mutations of his stormy career he was trusted and loved by Mr. Lincoln to the end of his days.
It is curious to observe, in this language, the roots of many English words, and it denotes through what lengths of mutations of history the stock words of a generic language may be traced.
Each of these lines culminates sooner or later in mutations of great size and highly specialised characters, which become extinct and leave no descendants.
The effects soon became exceedingly striking, the mutations were so quick and so forcibly antithetical.
I lay for some hours in the warm sunshine, in presence of the Italian mountains, watching the mutations of the air.
Of course his moral system had undergone all the mutations that are known to be dependent on a change of this important character.
The derivation and subsequent mutations of form will be treated somewhat in detail as the various forms come up, and a subsequent paper will dwell upon the topic at considerable length.
It is but little that we know respecting the mutations and distribution of force in the universe.
Whatever the course through which it has passed, whatever mutations it has undergone, whatever the force it has submitted to, its elementary constituents endure.
This ever liveth, and is unchangeable amidst all the mutations of a mysterious Providence.
Let us now observe some of the mutations of opinion to which allusion has been made.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "mutations" in a variety of sentences. We hope that you will now be able to make sentences using this word.
