Some unicellular species rely entirely on external energy sources and have limited or no photosynthetic apparatus.

Some sources mention the use of an abacus called a nepohualtzintzin in ancient Mayan culture.

Some sources state that At < sub > 2 </ sub > does not exist, or at least has never been observed, while other sources assert or imply its existence.

Some early sources call him their father or grandfather, but considering the commonly accepted dates of the fall of Troy ( 1184 BC ) and the founding of Rome ( 753 BC ), this seems unlikely.

Some sources state that following King Edward the Confessor's death in 1066, it was Ealdred who crowned Harold Godwinson as King of England.

Some other sources do classify him as an antipope.

Some sources record that the final blow, with the back of an axe, was delivered as an act of kindness by a Christian convert known as " Thrum.

Sources disagree, as may differing states ' laws, as to what category of plea the Alford plea falls under: Some sources state that the Alford guilty plea is a form of nolo contendere, where the defendant in the case states " no contest " to the factual matter of the case as given in the charges outlined by the prosecution.

Some sources include the requirement that the curve may not cross the line infinitely often, but this is unusual for modern authors.

Some celebrate in a way as near as possible to how the ancient Gaels did, while others observe the holiday with rituals taken from sundry unrelated sources, Gaelic culture being only one of the sources used.

Some sources say that the city may have been named after the Carthaginian general Hamilcar Barca, who was supposed to have founded the city in the 3rd century BC.

Some modern sources allude to a linguistic connection between the bunyip and Bunjil, " a mythic ' Great Man ' who made the mountains and rivers and man and all the animals.

Some incidents mentioned as having taken place within the Triangle are found only in these sources:

Some sources also add neighbouring countries ( for historical, geographical and / or cultural reasons ):

Some sources say he used it as a base for his raids on shipping, yet there is no documentary evidence for this assertion.

Some music historians argue that Chicanos of Los Angeles in the late 1970s might have independently co-founded punk rock along with the already-acknowledged founders from British-European sources when introduced to the US in major cities.

Some sources say McBride was asked for thousands of dollars in compensation from a businessman who owned the rights to the name Cleveland Panthers, an earlier failed football team.

Some sources derive the name of the weapon from the name of its first users — bernarda troopers called " carabiniers ", from the French carabine, from the Old French carabin ( soldier armed with a musket ), perhaps from escarrabin, gravedigger, perhaps from scarabee, scarab beetle.

Some early sources refer to pall mall being played over a large distance ( as in golf ), however an image in Strutt's 1801 book clearly shows a croquet-like ground billiards game ( balls on ground, hoop, bats and peg ) being played over a, garden-sized distance.

Some sources and Marker himself claim that he was born in Ulan Bator, Mongolia.

Some sources later, and even today, list his middle name erroneously as " Tecumseh ", apparently as a result of being nicknamed " The Chief " by teammates.

Some sources, including Newton, refer to the entire force as a centripetal force, even for eccentric orbits, for which gravity is not aligned with the direction to the center of curvature.

Some examples of sources ( with published dates where known ) that documented this approach are:

Some studies indicate that agricultural production and livestock numbers may only be sufficient to feed about half of the country's population.

* Some authors use the term " Epipaleolithic " for those cultures that are late developments of hunter-gatherer traditions but not in transition toward agriculture, reserving the term " Mesolithic " for those cultures, like the Natufian culture, that are transitional between hunter-gatherer and agricultural practices.

Some forms of polyandry appear to be associated with a perceived need to retain aristocratic titles or agricultural lands within kin groups, and / or because of the frequent absence, for long periods, of a man from the household.

Some of them migrated to the north of the peninsula in times of persecution bringing elements of the styles, food and agricultural practices learned from the Moors, while they continued practicing their Christianity with older forms of Catholic worship and their own versions of the Latin language.

Some agricultural areas depend on an accumulation of snow during winter that will melt gradually in spring, providing water for crop growth.

Some consider industrial and post-industrial societies to be qualitatively different from traditional agricultural societies.

Some of these were concerned with the rights of the population in the agricultural areas.

Some of the post war problems for the American agriculture come from the great surplus of farm goods that could not be absorbed in the national market, because European countries had recovered sufficiently from the war, and their markets no longer required large quantities of American agricultural products.

Some farmers opposed the Fordney-McCumber Tariff, blaming it for the agricultural depression.

Some of the failure to shift to more productive agricultural products may be related to ignorance about the benefits of changing land use.

Some forest damage from acid rain ( major forest damage occurred as a result of severe December 1999 windstorm ); air pollution from industrial and vehicle emissions ; water pollution from urban wastes, agricultural runoff, high pesticide use ( honeybee mortality )

Some versions of this myth conclude with Iasion and the agricultural hero Triptolemus then becoming the Gemini constellation.

Some of these were merely agricultural estates with a single foreign monk in residence to supervise things, others were rich foundations in their own right ( e. g. Lewes Priory which was a daughter of Cluny and answered to the abbot of that great French house ).

Some were unemployed agricultural workers looking for work helping produce food and resorting to banditry, theft and other crimes when they did not get it.

Some of the most desirable land in the city limits, located on the north and south sides of the Ventura Freeway, is permanently zoned for agricultural use.

Some countries in the EU have larger agricultural sectors than others, notably France and Spain, and consequently receive more money under the CAP.

Some critics of the common agricultural policy reject the idea of protectionism, either in theory, practice or both.

Some cormorant, pelican, gull and tern species have individuals that never visit the sea at all, spending their lives on lakes, rivers, swamps and, in the case of some of the gulls, cities and agricultural land.

Some of the materials needed are renewable resources, such as agricultural and forestry products, while others are nonrenewable, such as minerals.

Some of these chemicals, including potential endocrine disruptor Triclosan, can also travel through the soil column and leach into agricultural tile drainage at detectable levels.

Some advocate Fair Trade rules to ensure that poor farmers in developing nations that produce crops primarily for export are not exploited or negatively impacted by trade policies, practices, tariffs, and agreements which benefit one competitor at the expense of another-which advocates consider a dangerous " race to the bottom " in agricultural labor and safety standards.

Some historical village greens have been lost as a result of the agricultural revolution and urban development.

Some of these were concerned with the rights of the population in the agricultural areas.

Some populations are however in serious decline, particularly in the west of its range in Britain, Ireland, France, Belgium, the Netherlands, Denmark, and Germany, primarily due to agricultural intensification.