Formaldehyde gas has not very great penetrating power; it is not an insecticide, but kills bacteria in a very short time, and spores in an hour or two.
Bacteria are killed within a short time, but spores need a long time, and some of them resist the action of the sun for an indefinite period.
Moreover, living things reproduce; they give rise to other living things, either by growing and then dividing or by means of seeds or spores or eggs or other ways of producing young.
But here again there was a great advantage to be got by the development of some protection of the spores from drought that would enable reproduction to occur without submergence.
The air is full of thesespores of the mould plants, and wherever they find a place they will take possession of it, and grow up without planting or cultivating, as weeds do.
The spores are oblong, smooth, and very minute, measuring 5 × 2 µ.
The spores are in mass light yellow, and the spores on the surface of the plant probably give the color to the plant at this stage.
The colors vary from smoky to fuliginous, olive and yellow, and the spores are ferruginous.
The gills are white at first and become pink or salmon color as the plants mature, and the spores take on their characteristic color.
These old sterile bases of the plant are often found in the fields long after the spores have disappeared.
At maturity the wall, or peridium, breaks into brittle fragments, which disappear and the purplish mass of the spores is exposed.
The spores are rose color, pink, flesh or salmon color.
In the genus Hypholoma the spores are purple brown, the gills attached to the stem, and the veil when ruptured clings to the margin of the cap instead of to the stem, so that a ring is not formed, or only rarely in some specimens.
The spores may be caught on a thin, absorbent paper, and the paper then be floated on the fixative in a shallow vessel until it soaks through and comes in contact with the spores.
In many cases it is desirable to obtain spores in a mass on paper in order to know the exact tint of color produced by the species.
The spores in mass are light brown, and when fresh with a slight purple tinge.
These spores are round or somewhat amoeboid and are carried in the blood for a short time.
Sometimes, though not often, they form spores which not only provide for a more rapid multiplication, but enable the organism to live under conditions that would otherwise prove fatal to it.
When the spores are ready for dissemination a small aperture appears in the top of the peridium, through which they push their way outwards like a little puff of smoke.
At the expiration of a few hours we will find, on lifting the cap, a bed of the shed spores which will represent their exact shade.
Coniomycetes, in which the spores are naked, mostly terminal on inconspicuous threads, free or enclosed in a perithecium.
Mushroom spores are very variable in size, shape, and color, but are generally constant at maturity in the same genus.
Capillitium sub-compact, equal, adnate to the peridium on all sides; spores pedicillate, brownish.
The gills and spores are pure white, and the flesh peppery to the taste.
They dissolve away as the spores mature and can, therefore, only be observed in the very young stage of the plant.
These classes are again subdivided, according to the disposition of the spores and of the spore bearing surface, called the hymenium, into various families.
The gills are free from the stem, the spores are white, and the whole plant in youth is encased in an egg-shaped volva.
The Autobasidiomycetes are characterized by undivided basidia, bearing sporesonly at the apex.
Perhaps one of the most interesting discoveries in the Erian or Devonian rocks has been that of the immense abundance of spores of those humble plants the Rhizocarps, represented in modern times by the Pillworts and SalviniA|, &c.
During that and the succeeding hot and sweating stage the spores had entered the red blood corpuscles, and when the parasite had ensconced itself in the red blood corpuscle and begun to grow, the fever had come to an end.
Phagocytes attack many of these free spores and probably absorb most of them, as well as the little pieces of pigment.
A few of the spores escape and in virtue of some peculiar faculty, which is not at present understood, enter fresh blood corpuscles and appear there as pale specks in the haemoglobin.
In the intestine of a fresh host the cysts rupture and the sporesare liberated.
Cyst of Monocystis agilis, the common Gregarine of the Earthworm, showing ripe spores and absence of any residual protoplasm in the cyst.
The Gregarines are extremely numerous, and include several families, characterized, for the most part, by the form of the spores (fig.
This prevents infection from outside and also destroys any spores or fungus mycelium that may have been packed away along with the bulbs.
Spores had remained infinitely small even on the forgotten planet where fungi grew huge.
Burl led his people into the plain of red puffballs as soon as the rain had lasted long enough to wash down the red haze still hanging in the air and turn the fallen spores to mud.
With a ripping sound, the tough skin split across and a rush of the compressedspores shot skyward.
Farther on, two of them spouted their spores toward the clouds almost together.
Its tough skin was taut and bulging, resisting the pressure of the spores within.
The dry spores within billowed out and up like the smoke of a shell-explosion, spurting skyward for twenty feet and more.
It could be guessed that in one day more they would ripen in such monstrous numbers that anything which walked or flew or crawled must breathe in the spores and perish.
Months ago a storm-wind blew while somewhere, not too far distant, other red puffballs were bursting and sending their spores into the air.
It circled endlessly above the clouds, dribbling out a fine dust,--the spores of every conceivable microorganism which could break down rock to powder, and turn that dust to soil.
Reproduction takes place by endogenous budding, and the swarm spores are flat or lenticular with a distinct ciliary girdle.
At the end of its vegetative life this new individual fragments into biflagellated swarm-spores which may conjugate, reproducing the form with needles.
In the shales of the Devonian are found microscopicspores of rhizocarps in such countless numbers that their weight must be reckoned in hundreds of millions of tons.
It is to the resinousspores of the rhizocarps that the petroleum and natural gas from Devonian rocks are largely due.
The decomposition of the spores has made the shales highly bituminous, and the oil and gas have accumulated in the reservoirs of overlying porous sandstones.
In cannel coals the prevailing constituents are the spores of cryptogamic plants, algae being rare or in many cases absent.
In sporogony, great variation is seen with respect to the number of spores and sporozoites formed; and, as in Gregarines, these characters are largely used for purposes of classification, under which heading they are better considered.
On being eaten by a fresh host, the wall of the oocyst is dissolved at a particular region by the digestive juices, which are thus enabled to reach the sporesand cause the rupture of the sporocysts.
As a final result, each of the four spores contains two germs (sporozoites), and a certain amount of residual protoplasm (fig.
The sporesare dizoic and the sporocysts rounded or oval.
Spores also dizoic, but having the form of a double pyramid.
Many spherical spores (about 20) each with 12 sporozoites.
Mold spores are so widely distributed that, if proper temperature and moisture conditions prevail, thesespores will always develop.
Their high powers of resistance due to spores makes it difficult to eradicate this type, although they are materially held in subjection by the lactic bacteria.
This temperature varies, however, with the condition of the bacteria, and for spores is much higher than for vegetative forms.
Mold spores are so widely disseminated that if proper conditions are given for their germination, they are almost sure to develop.
Spore-bearing bacteria like anthrax withstand drying with impunity; even tuberculous material, although not possessing spores retains its infectious properties for many months.
If the organism is endowed with spores so that it can withstand unfavorable conditions, this taint may be spread from patron to patron simply through the infection of the vessels that are used in the transportation of the by-products.
Fortunately most of the bacteria capable of thriving in milk before or after it is drawn from the animal are not able to form spores and hence succumb to proper pasteurization.
I do not know why it is, but these spores do not germinate readily, and very few of them produce other plants.
How many puff-balls there would be if every one of these microscopic spores developed!
It should be borne in mind, however, that we have to deal not only with the adult organisms, but with the spores also.
This cycle may be repeated several times, and on our hypothesis we may believe it is caused by the successive development to maturity of spores of varying ages.
The application of cold may keep the spores from developing, while heat may promote their development, and the course of the disease may vary, therefore, according to our choice of treatment.
Eventually the cyst bursts, and the spores swarm forth.
The mycelium produced from the spores dropped by the fungus or from the "spawn" in the soil, radiates outwards, and each year's successive crop of fungi rises from the new growth round the circle.
The spores would appear to enter through the unbroken cutaneous surface, and to germinate mostly in and around the hair-follicle and sometimes in the shaft of the hair.
However it is clear that the farther infected products or trees are removed from healthy trees the less liable they are to have spores carried to them.
The Chairman: But, later on, cracks and squirrel scratches and all sorts of injuries would allow new spores to be carried in?
Experiments have shown that a gouge or knife may carry the spores into healthy bark and new infection take place.
The spores are viscid and adhere to the feet of beetles, or migratory birds which sometimes make long lateral flights following food, rather than direct flights north and south.
The small red pustules which produce the spores and, on rough barked trees, appear only in the crevices.
The mycelium and the spores were healthy and were affecting the new trees in quite the same manner as the year before and as in other parts of the state.
The spores may be carried by so many agents that it is difficult to prevent reinfection.
Experiments are being carried on in the laboratory to determine the length of time which spores will live in solutions of different strengths of fungicides.
Another problem in relation to tree treatment may be added, that is, the relation of spores and mycelium to toxic agents.
Concerning the question of carrying blight fifty miles, there's no telling how far birds will fly carrying the spores of Diaporthe upon their feet.
The germs or spores of some of these fermenting agents are always present in the air.
An examination of the discolored areas, under a microscope, shows the presence of tuft-like growths of spores upon short conidiophores.
As they become matured the sporesare scattered by the rain or wind and so the disease is spread.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "spores" in a variety of sentences. We hope that you will now be able to make sentences using this word.
