Question: Are there dwarf plants in the Kuiper belt?
About the article "Solar System", section "Kuiper belt".

Candidate passages:
The Kuiper belt is a great ring of debris similar to the asteroid belt, but consisting mainly of objects composed primarily of ice.
It extends between 30 and 50 AU from the Sun.
Though it is estimated to contain anything from dozens to thousands of dwarf planets, it is composed mainly of small Solar System bodies.
Many of the larger Kuiper belt objects, such as Quaoar, Varuna, and Orcus, may prove to be dwarf planets with further data.
There are estimated to be over 100,000 Kuiper belt objects with a diameter greater than 50 km, but the total mass of the Kuiper belt is thought to be only a tenth or even a hundredth the mass of Earth.
Many Kuiper belt objects have multiple satellites, and most have orbits that take them outside the plane of the ecliptic.
The Kuiper belt can be roughly divided into the "classical" belt and the resonances.
Resonances are orbits linked to that of Neptune (e.g.
twice for every three Neptune orbits, or once for every two).
The first resonance begins within the orbit of Neptune itself.
The classical belt consists of objects having no resonance with Neptune, and extends from roughly 39.4 AU to 47.7 AU.
Members of the classical Kuiper belt are classified as cubewanos, after the first of their kind to be discovered, , and are still in near primordial, low-eccentricity orbits.
50000 Quaoar ("Kwawar") is a rocky trans-Neptunian object in the Kuiper belt with one known moon.
It is probably a dwarf planet. 
The discovery of these large KBOs in similar orbits to Pluto led many to conclude that, bar its relative size, Pluto was not particularly different from other members of the Kuiper belt.
Not only did these objects approach Pluto in size, but many also possessed satellites, and were of similar composition (methane and carbon monoxide have been found both on Pluto and on the largest KBOs).
Thus, just as Ceres was considered a planet before the discovery of its fellow asteroids, some began to suggest that Pluto might also be reclassified.
The issue was brought to a head by the discovery of Eris, an object in the scattered disc far beyond the Kuiper belt, that is now known to be 27% more massive than Pluto.
In response, the International Astronomical Union (IAU), was forced to define what a planet is for the first time, and in so doing included in their definition that a planet must have "cleared the neighbourhood around its orbit".
As Pluto shared its orbit with so many KBOs, it was deemed not to have cleared its orbit, and was thus reclassified from a planet to a member of the Kuiper belt.
Although Pluto is currently the largest KBO, there are two known larger objects currently outside the Kuiper belt that probably originated in the Kuiper belt.
These are Eris and Neptune's moon Triton (which, as explained above, is probably a captured KBO).
As of 2008, only five objects in the Solar System (Ceres, Eris, and the KBOs Pluto, Makemake and Haumea) are listed as dwarf planets by the IAU.
However, 90482 Orcus, 28978 Ixion and many other Kuiper-belt objects are large enough to be in hydrostatic equilibrium; most of them will probably qualify when more is known about them. 
The Kuiper belt , sometimes called the Edgeworth–Kuiper belt (after the astronomers Kenneth Edgeworth and Gerard Kuiper), is a region of the Solar System beyond the planets, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun.
It is similar to the asteroid belt, but it is far larger—20 times as wide and 20 to 200 times as massive.
Like the asteroid belt, it consists mainly of small bodies, or remnants from the Solar System's formation.
Although some asteroids are composed primarily of rock and metal, most Kuiper belt objects are composed largely of frozen volatiles (termed "ices"), such as methane, ammonia and water.
The classical belt is home to at least three dwarf planets: Pluto, Haumea, and Makemake.
Some of the Solar System's moons, such as Neptune's Triton and Saturn's Phoebe, are also believed to have originated in the region.
Since the belt was discovered in 1992, the number of known Kuiper belt objects (KBOs) has increased to over a thousand, and more than 100,000 KBOs over in diameter are believed to exist.
The Kuiper belt was initially thought to be the main repository for periodic comets, those with orbits lasting less than 200 years.
However, studies since the mid-1990s have shown that the classical belt is dynamically stable, and that comets' true place of origin is the scattered disc, a dynamically active zone created by the outward motion of Neptune 4.5 billion years ago; scattered disc objects such as Eris have extremely eccentric orbits that take them as far as 100 AU from the Sun.
The Kuiper belt should not be confused with the hypothesized Oort cloud, which is a thousand times more distant.
The objects within the Kuiper belt, together with the members of the scattered disc and any potential Hills cloud or Oort cloud objects, are collectively referred to as trans-Neptunian objects (TNOs).
Pluto is the largest known member of the Kuiper belt, and one of the two largest known TNOs, together with scattered-disc object Eris.
Originally considered a planet, Pluto's status as part of the Kuiper belt caused it to be reclassified as a "dwarf planet" in 2006.
It is compositionally similar to many other objects of the Kuiper belt, and its orbital period is characteristic of a class of KBOs, known as "plutinos", that share the same 2:3 resonance with Neptune. 
20000 Varuna is a large classical Kuiper belt object.
It previously had the provisional designation and has been precovered in plates dating back to 1953.
It is probably a dwarf planet.