Pigeons generally have very small clutches, and the Dodo is said to have laid a single egg.

In plants and animals, an embryo develops from a zygote, the single cell that results when an egg and sperm fuse during fertilization.

The initial single cell combination is already dividing and by the time of entry into the uterus, the egg might have already reached the blastocyst stage.

This single set of chromosomes is duplicated in the egg, which develops parthenogenetically.

A single, white, elongated egg was laid per nesting.

A single egg is laid, usually in June, and incubated by both parents for about 45 days.

The popular Minesweeper game under older versions of Microsoft Windows had a cheat mode triggered by entering the comment < tt > xyzzy < tt >, then pressing the key sequence shift and then enter, which turned a single pixel in the top-left corner of the entire screen into a small black or white dot depending on whether or not the mouse pointer is over a mine .< ref > This easter egg was present in all Windows versions through Windows XP Service Pack 2, but under Windows 95, 98 and NT 4. 0 the pixel was visible only if the standard Explorer desktop was not running.

Even with high egg and intergenerational mortality, over a period of several weeks a single successful breeding pair can create a population of thousands.

After fertilization, the single egg ruptures through the body wall and adheres to nearby sand particles ; the parent is able to rapidly heal the resulting wound.

Clutches vary considerably in size: some larger passerines of Australia such as lyrebirds and scrub-robins lay only a single egg, most smaller passerines in warmer climates lay between two and five, whilst in the higher latitudes of the northern hemisphere hole-nesting species like tits can lay up to a dozen and other species around five or six.

The female builds an untidy nest, usually low to the ground in a moist gully, where she lays a single egg.

In other words, a single fertilized egg cell – the zygote – changes into the many cell types including neurons, muscle cells, epithelium, endothelium of blood vessels, etc.

In Aztec marketplaces, a small rabbit was worth 30 beans, a turkey egg cost 3 beans, and a tamal cost a single bean.

Only a single egg is laid per nesting attempt, and usually only a single nesting attempt is made per year, although the larger albatrosses may only nest once every two years.

Once they begin breeding, they make only a single breeding attempt per nesting season ; even if the egg is lost early in the season, they will seldom re-lay.

Large amounts of effort are placed into laying a single ( proportionally ) large egg and raising a single chick.

* 1876 — Oskar Hertwig and Hermann Fol independently described ( in sea urchin eggs ) the entry of sperm into the egg and the subsequent fusion of the egg and sperm nuclei to form a single new nucleus.

A third species of rhea, Rhea nana, was described by Lydekker in 1894 based on a single egg found in Patagonia, but today no major authorities consider it valid.

Diandry is mostly caused by reduplication of the paternal haploid set from a single sperm, but may also be the consequence of dispermic ( two sperm ) fertilization of the egg.

Nevertheless, the same author earlier states that Helen, Castor and Pollux were produced from a single egg.

Two sperm nuclei from a pollen grain ( the microgametophyte ), rather than a single sperm, enter the archegonium of the megagametophyte ; one fuses with the egg nucleus to form the zygote, the other fuses with two other nuclei of the gametophyte to form ' endosperm ', which nourishes the developing embryo.

The town was about what Wilson expected: one main street with its rows of false-fronted buildings, a water tower, a few warehouses, a single hotel ; ;

The mere fact that the tall figure with the rifle and field glasses had been seen riding that way was enough to frighten three rustling homesteaders out of the Upper Laramie country in a single week.

This arrangement was for Copernicus literally monstrous: `` With ( the Ptolemaists ) it is as though an artist were to gather the hands, feet, head and other members for his images from divers models, each part excellently drawn, but not related to a single body ; ;

If Robinson was a liar and a slanderer, he was also a very canny gentleman, for nothing that Pike could do would pry so much as a single word out of him.

However, in this case as elsewhere it was necessary to arrive at a single standard to be applied to all situations, representing an averaging of conditions, and thus to fix particular points in time which would be considered the dividing points between daytime and nighttime conditions.

Thus was invented the single thread sewing machine, which Mr. Gibbs in partnership with Mr. Willcox decided to bring to Brown & Sharpe with the proposal that the small company undertake its manufacture.

A single value of the thermal relaxation time Af at room temperature was measured by the progressive saturation method.

A single measurement of the spin - spin relaxation time Af was obtained at 10 Mc/sec by pulse methods.

The choice of the single member district was dictated to a certain extent by problems of communication and understanding in the more remote areas of the country, but it also served to minimize the national political value of the elections.

In order to be able to properly relate the data for a single company each of the three cards comprising the set for each firm was identified with the appropriate serial number of the respondent.

It was concluded that it would be appropriate to process the two groups of responses as a single sample of all small businesses engaged in, or wishing to sell to, defense programs.

A small single switchboard was installed in the Village over Woodcock's hardware store ( later E. H. Hemenway's ).

But not a single human life was lost, and property damage in the Hawaiian Islands did not exceed $800,000.

She knew also that I was unmarried and without a single known relative.

A single automobile was parked half-way up the block on the left-hand side.

Lemon was on with his fourth single of the game, a liner to center.

Turk Lown was tagged with the loss, his second against no victories, while Ray Moore won his second game against a single loss.

Now all he had to do was finish in even par to collect the trophy and the biggest single paycheck in golf.

On display were 343 first-class paintings and sculptures from his fabled collection -- and every single one of them was up for sale.

The D Minor Sonata, Op. 31 No. 2, introduced by dynamically shaped arpeggios, was most engaging in its moments of quasi-recitative -- single lines in which the fingers seemed to be feeling their way toward the idea to come.

The single largest organization of Anthropologists is the American Anthropological Association ( AAA ), which was founded in 1903.

Early anthropology was divided between proponents of unilinealism, who argued that all societies passed through a single evolutionary process, from the most primitive to the most advanced, and various forms of non-lineal theorists, who tended to subscribe to ideas such as diffusionism.

This central charge would thus be approximately half the atomic weight ( though it was almost 25 % off the figure for the atomic number in gold ( Z = 79, A = 197 ), the single element from which Rutherford made his guess ).

This was the case, for instance, in the Weapon Shop series, the Mixed Men series and in single stories such as " Heir Apparent ", whose protagonist was described as a " benevolent dictator ".