Certain fungi form mycorrhizal symbioses with trees that increase the supply of nutrients to the tree.

Certain characters are more likely to evolve convergently than others ; logically, such characters should be given less weight in the reconstruction of a tree.

Certain limonoids are insecticides such as azadirachtin from the neem tree.

Certain species are regarded as subhuman, like the Morlocks who lurk beneath New York City and have been discriminated against by the outside world because of their mutant deformities.

Certain internal organs, such as liver, and sometimes the skin, are highly toxic to most animals when eaten ; nevertheless, the meat of some species is considered a delicacy in Japan ( as 河豚, pronounced as fugu ), Korea ( as bok ), and China ( as 河豚 hétún ) when prepared by chefs who know which part is safe to eat and in what quantity.

Certain species of phytoplankton, dinoflagellates, contain photosynthetic pigments that vary in color from green to brown to red.

Certain plants of the cactus species ( pathok ) were planted at the head of the grave, the middle and the foot their personal possessions like the bow and arrow, betel pouch, were also buried.

Certain species can indeed gallop, including Cuban crocodiles, New Guinea crocodiles, African dwarf crocodiles, and even small Nile crocodiles.

Certain species of passerines have stiff tail feathers, which help the birds balance themselves when perching upon vertical surfaces.

Certain araphid species have been documented as anisogamous and are, therefore, considered to represent a transitional stage between centric and pinnate diatoms.

::* Varieties: Certain cirrus species can sometimes be divided into pattern-based varieties.

Certain species form communities called microatolls, which are colonies whose top is dead and mostly above the water line, but whose perimeter is mostly submerged and alive.

Certain fig species ( mainly F. cotinifolia, F. insipida and F. padifolia ) are traditionally used in Mesoamerica to produce papel amate ( Nahuatl: āmatl ).

Certain environmentalists are concerned that Iceland left the International Whaling Commission ( IWC ) in June 1992 in protest of an IWC decision to refuse to lift the ban on whaling, after the IWC Scientific Committee had determined that the taking of certain species could safely be resumed.

Certain species of fresh-water fish are also useful in consuming mosquito larvae, which may appear in outdoor enclosures.

" Certain species have gone from being little known or valued by local people to being highly valued commodities.

Certain species of gastropod seashells ( the shells of sea snails ) can sometimes be common, washed up on sandy beaches, and also on beaches that are surrounded by rocky marine habitat.

Certain species reached over in size.

Certain species consume worms or insects and carrion in their normal habitat.

Certain species of marine mussels prefer salt marshes or quiet bays, while others thrive in pounding surf, completely covering wave-washed rocks.

Certain strains of spore-producing bacteria ( such as Bacillus species ) and yeasts ( such as Cryptococcus flavescens ) show some promise for the control of FHB and the reduction of mycotoxin contamination, however there effectiveness at field level is not well known.

Certain conditions, such as low concentrations of oxygen or high concentrations of species such as chloride which complete as anions, can interfere with a given alloy's ability to re-form a passivating film.

Certain plant species have also been found to produce antiandrogens.

Certain species, such as Lampetia equestris or Eumerus tuberculatus, are responsible for pollination.

Certain species are more common in certain areas than others ; for example, the American hoverfly, Eupeodes americanus, is common in the Nearctic ecozone, and the Common hoverfly, Melangyna viridiceps, is common in the Australasia ecozone.

Certain species ( e. g. the Herring Gull ) have exhibited tool use behaviour, using pieces of bread as bait with which to catch goldfish, for example.

Certain species are seemingly preferred, whereas others, like the Lichtenstein's hartebeest or Topi are generally avoided.

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.