Certain lepidopterous caterpillars feed on the leaves and flowers.

Certain bat-pollinated wild pineapples only open their flowers at night.

Certain plants in particular seasons might produce closed, self-pollinating ( cleistogamous ) flowers ; but the same plant or species might produce open, insect-pollinated flowers elsewhere or at a different time of year, and with no obvious pattern.

Certain species have specialized bills that allow them to feed from the flowers of certain species of plants.

Certain government bureaucracies, such as a department of motor vehicles will issue an abstract of a completed transaction or an updated record intended to serve as a proof of compliance with some administrative requirement.

Certain specific conditions are excluded as disabilities, such as current substance abuse and visual impairment that is correctable by prescription lenses.

Certain indigenous religious groups such as the Australian Aborigines are more typically totemic, whereas others like the Inuit are more typically animistic in their worldview.

Certain high church services and other musical events in liturgical churches ( such as the Roman Catholic Mass and the Lutheran Divine Service ) may be a cappella, a practice remaining from apostolic times.

Certain indigenous Dayak people ( such as the Kayan, Kenyah, Lun Bawang / Lun Dayeh, Punan Bah and Penan ) living on the island have been struggling for decades for their right to preserve their environment from loggers and transmigrant settlers and colonists.

Certain names of places, such as Streetsboro, OH, Greensboro, NC, and Maynesborough, NH reflect the historical use of Borough as a geographical scale in the United States.

Certain international trade laws, such as those on intellectual property, are also enforced in India.

Certain viruses such as Hepatitis B and human papilloma viruses have been found to cause cancer in humans.

* Certain kinds of memory leaks, in which a program fails to free memory occupied by objects that have actually become unreachable, which leads to memory exhaustion if such a behavior is repeated indefinitely.

Certain Jewish thinkers, such as Maimonides, believed that concubines are strictly reserved for kings, and thus that a commoner may not have a concubine ; indeed, such thinkers argued that commoners may not engage in any type of sexual relations outside of a marriage.

Certain Brezhnev appointees were kept, such as Viktor Chebrikov and Nikolai Savinkin.

Certain devices, such as avalanche diodes, deliberately make use of the effect.

Certain drawing methods or approaches, such as " doodling ," other informal kinds of drawing, and the surrealist method of " entopic graphomania ", in which dots are made at the sites of impurities in a blank sheet of paper, and lines are then made between the dots, may or may not be considered part of " drawing " as a " fine art ".

Certain non-standard regional and economic class-associated dialects do decline the article, either in regular speech or in slang-as in expressions such as " How do you like them apples?

Certain forms treat all knowledge as empirical, while some regard disciplines such as mathematics and logic as exceptions.

Certain other genera of symbiotic amoebae, such as Endamoeba, might prove to be synonyms of Entamoeba but this is still unclear.

Certain popular stories, such as the Prodigal Son and the Good Samaritan, are found only in this gospel.

Certain countries such as the United Kingdom are unaffected as they maintain more stringent gun control laws than those effectively set as a minimum by the European Union.

Certain initiates such as Alex Sanders and Raymond Buckland who brought his take on the Gardnerian tradition to the United States in 1964 started off their own major traditions allowing further expansion.

Certain European ritual traits such as the significance of the number 3, the importance of the head and of water sources such as springs remain in the archaeological record, but the differences in the votive offerings made at the Roman Baths ( Bath ), Bath, Somerset before and after the Roman conquest suggest that continuity was only partial.

Certain scholars and political leaders feel that these modern developments endanger nation states by taking power away from state governments and ceding it to international bodies such as the U. N. and the World Bank, argue that international law has evolved to a point where it exists separately from the mere consent of states, and discern a legislative and judicial process to international law that parallels such processes within domestic law.

Certain host symptoms, such as aching muscles and fever, are related to the production of IFNs during infection.

Certain pesticides can have damaging effects on the taste buds and nerves in the mouth.

Certain plant diseases-notably phytoplasmas-can cause the proliferation of axillary buds, and cause plants to become bushy in appearance.

Willard Thorp, in his new book, American Writing In The Twentieth Century, observes, quite validly it seems: `` Certain subjects are conspicuously absent or have been only lightly touched.

Certain features we have touched upon: philosophy as a logical, deductive system from which a social science methodology can be built up ; ;

`` Certain people must have known about it ''.

Certain facts of their lives have been attributed to him, as well as some of their works: thus the Life of St Bernard should be ascribed to Alain of Auxerre and the Commentary upon Merlin to Alan of Tewkesbury.

Certain natural substances are reputed to have anxiolytic properties, including the following:

Certain basic teachings appear in many places throughout the early texts, so most scholars conclude that the Buddha must at least have taught these teachings:

Certain Boer nationalists have asserted that they do not consider themselves a right-wing element of the political spectrum.

Certain elements have no stable isotopes and are composed only of radioactive isotopes: specifically the elements without any stable isotopes are technetium ( atomic number 43 ), promethium ( atomic number 61 ), and all observed elements with atomic numbers greater than 82.

Certain stereotypical patterns of breathing have been identified including Cheyne-Stokes a form of breathing in which the patient's breathing pattern is described as alternating episodes of hyperventilation and apnea.

Certain experts have noted the shape of a domestic dog's brain case is closer to the coyote's in shape than that of a wolf's.

Certain chemotherapy agents also have a role in the treatment of other conditions, including ankylosing spondylitis, multiple sclerosis, Crohn's disease, psoriasis, psoriatic arthritis, rheumatoid arthritis, and scleroderma.

Certain scholars have argued that she should be seen as an early feminist who efficiently used language to convey that women could play an important role within society.

Certain rules have traditionally been given for this particular type of definition.

* Certain population segments have been historically under-researched ( racial minorities and people with co-morbid diseases ), and thus the RCT restricts generalizing.

Certain aspects of XP have changed since the book Extreme Programming Refactored ( 2003 ) was published ; in particular, XP now accommodates modifications to the practices as long as the required objectives are still met.

Certain of his film related material and personal papers are contained in the Wesleyan University Cinema Archives to which scholars and media experts from around the world may have full access.

Certain insurance products and practices have been described as rent-seeking by critics.

Certain courts, particularly the United States Supreme Court and most state supreme courts, have discretionary jurisdiction, meaning that they can choose which cases to hear from among all the cases presented on appeal.

Certain, often more expensive keyboards have a diode between each intersection, allowing the keyboard microcontroller to accurately sense any number of simultaneous keys being pressed, without generating erroneous ghost keys ..

Certain resolutions of these paradoxes, particularly Graham Priest's dialetheism as formalised in LP, have the law of excluded middle as a theorem, but resolve out the Liar as both true and false.

Certain tree species, such as hemlock, have also been particularly depleted by past logging activity.