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Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes labeled and increments from -10 to 10.

-10 To 10 Coordinate Grid With Axes Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes labeled…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To 10 on each axis. Axes and increments are not labeled.

-10 To 10 Coordinate Grid With No Labels

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments And Axes Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and increments…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Axes And Some Increments Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and some…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Some Increments Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with some increments from -10…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and increments from -10 To 10 labeled by 5s.

-10 To 10 Coordinate Grid With Axes And Increments Labeled By 5s

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and increments…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To 10 labeled by 5s.

-10 To 10 Coordinate Grid With Increments Labeled By 5s

Illustration of an xy grid/graph. It is the Cartesian coordinate system with increments from -10 To…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with axes and some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Axes And Increments Labeled By 10s

Illustration of an xy grid/graph. It is the Cartesian coordinate system with axes and some increments…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments Labeled By 10s

Illustration of an xy grid/graph. It is the Cartesian coordinate system with some increments from -10…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and even increments from -10 to 10 labeled.

-10 To 10 Coordinate Grid With Axes And Even Increments Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with the x- and y-axes and even…

Illustration of an xy grid/graph. It is the Cartesian coordinate system with even increments from -10 to 10 labeled.

-10 To 10 Coordinate Grid With Even Increments Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with even increments from -10…

Illustration of an xy grid/graph. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid

Illustration of an xy grid/graph. It is the Cartesian coordinate system. Neither axis is labeled.

Illustration of an xy grid/graph. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled

Illustration of an xy grid/graph. It is the Cartesian coordinate system with both axes labeled.

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes labeled and increments from -5 to 5.

-5 To 5 Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments from -5 to 5 on each axis. Axes and increments are not labeled.

-5 To 5 Coordinate Grid With Grid Lines Shown, But No Labels

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Increments And Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and odd increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Axes And Odd Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with odd increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Odd Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with odd…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the axes and some increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Axes And Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the axes and some increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Axes And Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some increments at -5 to 5 labeled.

-5 To 5 Coordinate Grid With Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and even increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Axes And Even Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with even increments from -5 to 5 labeled.

-5 To 5 Coordinate Grid With Even Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with even…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes labeled and increments from -10 to 10.

-10 To 10 Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments from -10 To 10 on each axis. Axes and increments are not labeled.

-10 To 10 Coordinate Grid With Grid Lines Shown, But No Labels

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments And Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Axes And Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Some Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and increments from -10 To 10 labeled by 5s.

-10 To 10 Coordinate Grid With Axes And Increments Labeled By 5s And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments from -10 To 10 labeled by 5s.

-10 To 10 Coordinate Grid With Increments Labeled By 5s And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with increments…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with axes and some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Axes And Increments Labeled By 10s And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with axes…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some increments from -10 To 10 labeled.

-10 To 10 Coordinate Grid With Increments Labeled By 10s And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with some…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the x- and y-axes and even increments from -10 to 10 labeled.

-10 To 10 Coordinate Grid With Axes And Even Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with the…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with even increments from -10 to 10 labeled.

-10 To 10 Coordinate Grid With Even Increments Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with even…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid With Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both…

Diagrams of the nucleus showing the arrangement of chief chromatic filaments. A, Viewed from the side, the polar end being uppermost. Labels: p.c.f., primary chromatic filaments; n, nucleolus; n.o.m., node of meshwork. B, Viewed at the polar end. Labels: l.c.f., lopped chromatic filament; i.f., irregular filament.

Nucleus Showing Chromatic Filaments

Diagrams of the nucleus showing the arrangement of chief chromatic filaments. A, Viewed from the side,…

The maturation of the ovum. A, An ovum at the commencement process. B, After the formation of the spindle. The chromosomes are gathered at the equator of the spindle in groups of four, i.e. in tetrads, each which consists of two dyads. C, One apex of the spindle has projected into a bud on the surface, and the dyads have passed to the poles. D, The separation of the first polar body. E, The commencement of the second polar body; F, The completion of the second polar body.

Maturation of the Ovum

The maturation of the ovum. A, An ovum at the commencement process. B, After the formation of the spindle.…

The woodpeckers, piculets and wrynecks are a family, Picidae, of near-passerine birds . Members of this family are found worldwide, except for Australia and New Zealand, Madagascar, and the extreme polar regions. Most species live in forests or woodland habitats, although a few species are known to live in desert areas.

Woodpecker

The woodpeckers, piculets and wrynecks are a family, Picidae, of near-passerine birds . Members of this…

In polar dials, the shadow-receiving plane is aligned parallel to the gnomon-style. Thus, the shadow slides sideways over the surface, moving perpendicularly to itself as the sun rotates about the style. As with the gnomon, the hour-lines are all aligned with the Earth's rotational axis. When the sun's rays are nearly parallel to the plane, the shadow moves very quickly and the hour lines are spaced far apart. The direct East- and West-facing dials are examples of a polar dial. However, the face of a polar dial need not be vertical; it need only be parallel to the gnomon.

Polar Dials

In polar dials, the shadow-receiving plane is aligned parallel to the gnomon-style. Thus, the shadow…

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ = a cos b θ. A, three-leaved rose of equation ρ = a sin 3 θ." -Whitney, 1911

Rose

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ…

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ = a cos b &theta. B, three-leaved rose of equation ρ = a cos 3 &theta." -Whitney, 1911

Rose

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ…

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ = a cos b &theta. C, four-leaved rose of equation ρ = a sin 2 &theta." -Whitney, 1911

Rose

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ…

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ = a cos b &theta. D, four-leaved rose of equation ρ = a cos 2 &theta." -Whitney, 1911

Rose

"In geometry, certain transcendental curves having, in polar coordinates, equations of the form ρ…

Oxalis is the largest genus in the wood sorrel family Oxalidaceae. Of the approximately 900 known species in the Oxalidaceae, 800 belong to Oxalis. Many of the species are known as Wood Sorrel or Woodsorrel. The genus occurs throughout most of the world, except for the polar areas; species diversity is particularly rich in tropical Brazil and Mexico and in South Africa.

Oxalis

Oxalis is the largest genus in the wood sorrel family Oxalidaceae. Of the approximately 900 known species…

Chaetognatha is a phylum of predatory marine worms that are a major component of plankton worldwide. About 20% of the known species are benthic and can attach to algae or rocks. They are found in all marine waters from surface tropical waters and shallow tide pools to the deep sea and polar regions. Most chaetognaths are transparent and are torpedo shaped. Some deep-sea species are orange. They range in size from 2 mm to 12 cm. The common term for the phylum is Arrow Worms. There are more than 120 modern species assigned to over 20 genera. Despite the limited diversity of species, the number of individuals is staggering.

Chaetognatha

Chaetognatha is a phylum of predatory marine worms that are a major component of plankton worldwide.…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither axis is labeled.

Blank Coordinate Grid With Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system. Neither…

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both axes labeled.

Coordinate Grid With Axes Labeled And Grid Lines Shown

Illustration of an xy grid/graph with grid lines shown. It is the Cartesian coordinate system with both…

Illustration of a trigonometric grid with a domain from -π to π and a range from -1 to 1. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -1 to 1

Illustration of a trigonometric grid with a domain from -π to π and a range from -1 to 1. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -2 to 2. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -2 to 2

Illustration of a trigonometric grid with a domain from -π to π and a range from -2 to 2. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -3 to 3. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -3 to 3

Illustration of a trigonometric grid with a domain from -π to π and a range from -3 to 3. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -4 to 4. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -4 to 4

Illustration of a trigonometric grid with a domain from -π to π and a range from -4 to 4. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -5 to 5. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -5 to 5

Illustration of a trigonometric grid with a domain from -π to π and a range from -5 to 5. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -6 to 6. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -6 to 6

Illustration of a trigonometric grid with a domain from -π to π and a range from -6 to 6. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -7 to 7. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -7 to 7

Illustration of a trigonometric grid with a domain from -π to π and a range from -7 to 7. The…

Illustration of a trigonometric grid with a domain from -π to π and a range from -8 to 8. The increments on the x-axis are marked in intervals of ½π.

Trigonometry Grid With Domain -π to π And Range -8 to 8

Illustration of a trigonometric grid with a domain from -π to π and a range from -8 to 8. The…