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Topics referred to by the same term
Look up facultative in Wiktionary, the free dictionary. Facultative means "optional" or "discretionary" (antonym obligate), and is used mainly in biology
Facultative
Animal capable of walking or running on two legs in response to exceptional circumstances
A facultative biped is an animal that is capable of walking or running on two legs (bipedal), as a response to exceptional or discretionary (facultative)
Facultative_bipedalism
Asexual reproduction without fertilization
switch between sexual reproduction and parthenogenesis. This is called facultative parthenogenesis (other terms are cyclical parthenogenesis, heterogamy
Parthenogenesis
Relationship between organisms
A facultative parasite is an organism that may resort to parasitic activity, but does not absolutely rely on any host for completion of its life cycle
Facultative_parasite
Beings that can respire with and without oxygen
A facultative anaerobic organism is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation
Facultative anaerobic organism
Facultative_anaerobic_organism
Organism that eats mostly or exclusively animal tissue
those that also consume non-animal food are called mesocarnivores, or facultative carnivores, or omnivores (there are no clear distinctions). A carnivore
Carnivore
Asexual reproduction by snakes and lizards
species are also capable of parthenogenesis in the absence of males (facultative parthenogenesis), but recent research has revealed that this ability
Parthenogenesis_in_squamates
Waste treatment pond
Facultative lagoons are a type of waste stabilization pond used for biological treatment of industrial and domestic wastewater. Sewage or organic waste
Facultative_lagoon
Ecological interaction between taxa
that one or both of the organisms depend on each other for survival, or facultative, meaning that they can subsist independently. When one organism lives
Symbiosis
Genus of bacteria
Lactobacillus is a genus of gram-positive bacteria within the Lactobacillaceae family. Members of the genus are aerotolerant anaerobes or microaerophilic
Lactobacillus
Type of heterotrophic nutrition based on decayed organic matter
Look up saprotroph in Wiktionary, the free dictionary. A saprotroph is an organism that feeds on dead organic matter or waste by excreting chemicals to
Saprotroph
Microparasite that grows within a host cell
pathogens. There are two main types of intracellular parasites: Facultative and Obligate. Facultative intracellular parasites are capable of living and reproducing
Intracellular_parasite
Insurance purchased by an insurance company
is known as facultative reinsurance. Facultative reinsurance can be written on either a proportional or excess of loss basis. Facultative reinsurance
Reinsurance
Microorganism killed by normal atmospheric levels of oxygen
that fall in between these two extremes may be classified as either facultative anaerobes, which can use oxygen but also survive without it, or microaerophiles
Obligate_anaerobe
Seed release in response to environment
immediately; such plants are essentially non-serotinous, but may be termed facultatively serotinous. In the Southern Hemisphere, fire-mediated serotiny, pyriscence
Serotiny
Evolutionary reproductive strategy of mammals
concentration and therefore induces embryonic facultative diapause. Each species that undergoes facultative diapause tends to have a specific developmental
Embryonic_diapause
Conversion of a gene's sequence into a mature gene product or products
constitutive gene is a gene that is transcribed continually as opposed to a facultative gene, which is only transcribed when needed. A housekeeping gene is a
Gene_expression
Organisms that live at the surface of a body of water
abundance in the vicinity of the surface on which they reside day and night facultative neuston: organisms concentrating at the surface only during certain hours
Neuston
Bacteria that can enter and survive in host cells
intracellular bacterial species. There are two types of intracellular bacteria: facultative intracellular bacteria, which can grow extracellularly or intracellularly
Intracellular_bacteria
Organism that maintains body temperature largely by heat from internal bodily functions
temperature above the ambient temperature using exercise. These are known as facultative or exercise endotherms. The honey bee, for example, does so by contracting
Endotherm
Genus of bacteria
Lelliottia is a genus of Gram-negative, facultatively anaerobic, rod-shaped bacteria belonging to the family Enterobacteriaceae. It was proposed in 2013
Lelliottia
Type of plant
an obligate root hemiparasite. Rhinanthus (e.g. Yellow rattle) is a facultative root hemiparasite. Mistletoe is an obligate stem hemiparasite. Holoparasites
Parasitic_plant
Country in Southwestern Europe
regional holidays celebrated only in Madeira and the Azores and two facultative holidays which are the Entrudo [pt] and one municipal holiday allowed
Portugal
Warm-blooded animals with wings and feathers
faeces as a semisolid waste. However, birds such as hummingbirds can be facultatively ammonotelic, excreting most of the nitrogenous wastes as ammonia. They
Bird
Compact and highly condensed form of chromatin
continuum between the two extremes of constitutive heterochromatin and facultative heterochromatin. Both play a role in the expression of genes, and correlate
Heterochromatin
Country in Northwestern Europe and the Caribbean
from (on average) ages 4 to 12. It has eight grades and the first is facultative. Based on an aptitude test, the eighth grade teacher's recommendation
Netherlands
Organism that thrives in an oxygenated environment
oxidize substrates (for example sugars and fats) and generate energy. Facultative anaerobes use oxygen if it is available, but also have anaerobic methods
Aerobic_organism
American evolutionary biologist and sociobiologist (1943–2026)
theories of reciprocal altruism (1971), parental investment (1972), facultative sex ratio determination (1973), and parent–offspring conflict (1974)
Robert_Trivers
Order of reptiles
snake) and Agkistrodon piscivorus (cottonmouth snake) can reproduce by facultative parthenogenesis; they are capable of switching from a sexual mode of
Squamata
constitutive (acting as permanent domain boundaries in all cell types) or facultative (cell type- and activity-related) depending on their dynamic properties
Scaffold/matrix attachment region
Scaffold/matrix_attachment_region
Category of plant
metallophytes and facultative metallophytes. Obligate metallophytes can only survive in the presence of heavy metals while facultative metallophytes can
Hyperaccumulator
Respiration using electron acceptors other than oxygen
Obligate aerobes and facultative anaerobes O2 H2O +0.82 Aerobic organisms such as Escherichia coli (Per)chlorate respiration Facultative anaerobes ClO−4,
Anaerobic_respiration
Species of bacterium
Methylopila musalis is a Gram-negative, aerobic, facultatively methanotrophic, rod-shaped non-spore-forming and motile bacterium species from the genus
Methylopila_musalis
Species of bacterium
Methylopila jiangsuensis is a Gram-negative, aerobic, facultatively methanotrophic and non-spore-forming bacterium species from the genus Methylopila
Methylopila_jiangsuensis
Disease-causing bacteria
Positive Rods Facultative anaerobic Extracellular Bartonella Bartonella henselae Bartonella quintana Negative Rods Aerobic Facultative intracellular Bordetella
Pathogenic_bacteria
Living things grouping together, usually for common benefit
survive and reproduce. Some organisms are primarily independent and form facultative colonies in reply to environmental conditions while others must live
Colony_(biology)
Classification of United States plant species by frequency of occurrence in wetlands
probability 1% – 33%). Facultative (FAC) - Equally likely to occur in wetlands and non-wetlands (estimated probability 34% – 66%). Facultative upland (FACU) -
Wetland_indicator_status
Species of lizard
undergo facultative parthenogenesis by a post-meiotic mechanism resulting in genome wide homozygosity. In many species that are capable of facultative parthenogenesis
Arizona_striped_whiptail
Bacterium
Aquipluma is a facultatively anaerobic genus of Gram-negative bacteria from the family of Prolixibacteraceae with one known species (Aquipluma nitroreducens)
Aquipluma
Genus of bacteria
Draconibacterium is a genus of facultatively anaerobic bacteria from the family Prolixibacteraceae. "Genus: Draconibacterium". LPSN.DSMZ.de. Parker, Charles
Draconibacterium
Extinct genus of brachiopods
brachiopods found in Aksayan to Batyrbaian strata in Kazakhstan. It was a facultatively mobile infaunal suspension feeder. Aboriginella in the Paleobiology
Aboriginella
Suborder of single-celled organisms
of phylum Apicomplexa. All species in this clade are homoxenous or facultatively homoxenous. Merogony, gamogony and oocyst formation all occur within
Eimeriorina
Organism not requiring oxygen for its growth
Aerotolerant organisms do not use oxygen but can tolerate it, whereas facultative anaerobes can grow without oxygen but use it when available. Most anaerobes
Anaerobic_organism
Genus of sea cucumbers
members of this genus possess the ability to swim, although this is only facultative. As adults, species of Psychropotes are roughly cylindrical in shape
Psychropotes
Genus of bacteria
Gardnerella is a genus of Gram-variable-staining facultative anaerobic bacteria. It is named after Hermann L. Gardner (1912–1982), an American bacteriologist
Gardnerella
Group of bacterial species
their optimal growth temperature of 35–37 °C. They can be aerobes or facultative aerobes, and are a commonly used indicator of low sanitary quality of
Coliform_bacteria
Species of bacterium
pathogen of soft tissue infections in the lower body. S. turicensis is a facultative anaerobe, growing in air and CO2 conditions. The bacterium produces small
Schaalia_turicensis
Passenger train service in Indonesia
train that operates at certain times. This mean the Sancaka train as a facultative train from Yogyakarta & Surabaya. Since the enactment of new train travel
Sancaka
Genus of bacteria
Pseudocitrobacter is a genus of gram-negative, facultatively anaerobic, rod-shaped, non-hemolytic, and oxidase-negative bacteria. It was first isolated
Pseudocitrobacter
Species of lizard
look much like the adults, except they have bright blue colored tails. Facultative parthenogenesis can occur in A. marmoratus haploid unfertilized oocytes
Marbled_whiptail
Fish that remove parasites and dead tissue from other species
There are two types of cleaner fish, obligate full time cleaners and facultative part time cleaners where different strategies occur based on resources
Cleaner_fish
Species of bird
a growth inequality and size disparity between siblings, leading to facultative siblicide in times of food scarcity. This makes the blue-footed booby
Blue-footed_booby
Species of ants that steal young ants of another species to contribute to their colony
parasites (thus depending on enslaved ants throughout their whole lives) or facultative slave-makers. The behavior is unusual among ants but has evolved several
Slave-making_ant
Animal that feeds on coral
It is thought that some facultative corallivores, such as some damselfish, eat coral to promote algal growth. Many facultative corallivores also graze
Corallivore
Species of fish
original on 2019-05-08. Retrieved 2019-05-30. Gill morphometry of the facultative air-breathing loricariid fish,Hypostomus plecostomus (Walbaum) with,
Hypostomus_plecostomus
Clade of reptiles
However, at least some modern birds (such as hummingbirds) can be facultatively ammonotelic, excreting most of the nitrogenous wastes as ammonia. This
Dinosaur
Genus of bacteria
Kluyvera is a Gram negative, facultatively anaerobic bacterial and motile genus from the family of Enterobacteriaceae which have peritrichous flagella
Kluyvera
Ponds designed and built for wastewater treatment
configurations of pond systems are: Facultative pond only; Anaerobic pond followed by a facultative pond; Facultative pond followed by maturation ponds
Waste_stabilization_pond
Pathogen fungus
rolfsii is a corticioid fungus in the order Amylocorticiales. It is a facultative plant pathogen and is the causal agent of "southern blight" disease in
Agroathelia_rolfsii
Genus of bacteria
Tessaracoccus is a Gram-positive, non-spore-forming, facultatively anaerobic and non-motile bacterial genus from the family Propionibacteriaceae. The
Tessaracoccus
Biochemistry and ecology Oxygen preference Aerobic Obligate Facultative Anaerobic Facultative Obligate Microaerophile Nanaerobe Aerotolerant Other Extremophile
Type_IX_secretion_system
Species of bacterium
Methylobacterium persicinum is a facultatively methylotrophic and aerobic bacteria from the genus of Methylobacterium which has been isolated from the
Methylobacterium phyllosphaerae
Methylobacterium_phyllosphaerae
Intense physical sensation of sexual release
hookup. These findings suggest that the functions of female orgasm may be facultative, used for either conception, in those more open to uncommitted sex, or
Orgasm
Organism that can use a mix of different sources of energy and carbon
it is indispensable for its growth and maintenance; a trophic mode is facultative when used as a supplemental source. Some organisms have incomplete Calvin
Mixotroph
Species of bacterium
Enterobacter cloacae is a species of gram-negative, facultatively-anaerobic, rod-shaped bacterium from the order Enterobacterales. This species is a commensal
Enterobacter_cloacae
Microorganisms whose metabolism is not dependent on, and not poisoned by, oxygen
aerotolerant organisms cannot use oxygen but tolerate its presence, and facultative anaerobes use oxygen if it is present but can grow without it.[citation
Aerotolerant_anaerobe
Species of reptile
embryos occur without fertilization. A. contortrix can reproduce by facultative parthenogenesis, that is, they are capable of switching from a sexual
Eastern_copperhead
Passenger train service between Jakarta and Surakarta (Solo), Indonesia
Balapan. The Manahan train is a rebranding of the Argo Lawu Facultative and Argo Dwipangga Facultative train services with the Solo Balapan–Gambir route, which
Manahan_(train)
Species of bacteria
Chitinophaga aurantiaca is a Gram-negative, rod-shaped, facultatively anaerobic and non-motile bacterium from the genus Chitinophaga. "Species: Chitinophaga
Chitinophaga_aurantiaca
Species of bacterium
Pigmentiphaga litoralis is a gram-negative, oxidase and catalase-positive, facultatively anaerobic non-spore-forming, non-motile, rod-shaped bacterium from the
Pigmentiphaga_litoralis
Species of cockroach
to develop, and live for 344 days. Nauphoeta cinerea can reproduce by facultative parthenogenesis, that is, some are capable of switching from a sexual
Nauphoeta
Organism that requires oxygen to grow
with functions that are usually attributed to anaerobic metabolism in facultatively and strictly anaerobic bacteria. When obligate aerobes are in a temporarily
Obligate_aerobe
Species of bacterium
Prosthecobacter algae is a Gram-negative, facultatively anaerobic and fusiform-shaped bacterium from the genus Prosthecobacter which has been isolated
Prosthecobacter_algae
Genus of bacteria
Catenococcus is a Gram-negative and facultatively anaerobic genus of bacteria from the family of Vibrionaceae with one known species (Catenococcus thiocycli)
Catenococcus
Species of bacterium
gergoviae (formerly Enterobacter gergoviae) is a Gram-negative, motile, facultatively-anaerobic, rod-shaped bacterium. P. gergoviae is of special interest
Pluralibacter_gergoviae
Species of bacterium
Demequina activiva is a Gram-positive, facultatively anaerobic, rod-shaped and non-spore-forming bacterium from the genus Demequina which has been isolated
Demequina_activiva
Reproduction without a sexual process
Parthenogenetic organisms can be split into two main categories: facultative and obligate. In facultative parthenogenesis, females can reproduce both sexually and
Asexual_reproduction
its own official language. Russian and other languages may be used facultatively in certain public institutions, such as notary services and in contact
Languages_of_Uzbekistan
Species of bacterium
of the most common types of bacteria in the world.[specify] It is a facultative intracellular microbe that targets red blood cells. In the United States
Bartonella_henselae
Species of bacterium
Gram-negative bacteria belonging to the family Pasteurellaceae. It is a facultatively anaerobic, non-spore-forming, and non-motile coccobacillus. M. haemolytica
Mannheimia_haemolytica
Genus of bacteria
Gram-negative bacteria in the family Pasteurellaceae. Members of this genus are facultatively anaerobic, non-motile, rod-shaped bacteria primarily associated with
Rodentibacter
Species of mosquito
scales and leg paddles, which are involved in courtship. The larvae are facultative predators, using their siphon to capture prey, often other mosquito larvae
Sabethes_cyaneus
Process of forming the first eukaryotic cell
and capability, with a nucleus, at least one centriole and cilium, facultatively aerobic mitochondria, sex (meiosis and syngamy), a dormant cyst with
Eukaryogenesis
Species of bacterium
consisting of spherical, Gram-positive, nonmotile, non-spore-forming, facultative anaerobic bacteria. It is coagulase-negative and is probably a commensal
Staphylococcus_pettenkoferi
Species of bacterium
Proteus hauseri is a gram-negative, facultatively anaerobic, rod-shaped bacterium. This species is closely related to Proteus vulgaris. Similar to other
Proteus_hauseri
Species of bacterium
Krasilnikoviella muralis is a Gram-positive and facultatively anaerobic bacterium from the genus Krasilnikoviella. Nishijima, Miyuki; Tazato, Nozomi;
Krasilnikoviella_muralis
Species of bacterium
Ferrimonas gelatinilytica is a Gram-negative, facultatively anaerobic and motile bacterium from the genus of Ferrimonas which has been isolated from tidal
Ferrimonas_gelatinilytica
Species of bacterium
Weissella fabalis is a facultatively anaerobic and non-motile bacterium from the genus of Weissella which has been isolated from fermented cocoa beans
Weissella_fabalis
Species of bacterium
acidifermentans is a Gram-positive, coccus-shaped, non-spore-forming, facultatively species of anaerobic bacteria. The type strain is AC-1(T) (= KCTC 13418(T)
Vagococcus_acidifermentans
Species of catfish
reaches 16.5 cm (6.5 inches) in standard length and is believed to be a facultative air-breather. "WoRMS - World Register of Marine Species - Hypostomus
Hypostomus_fluviatilis
Genus of bacteria
Egibacter rhizosphaerae is a Gram-positive, obligately halophilic, facultatively alkaliphilic, non-spore-forming, and non-motile bacterium from the genus
Egibacter
Species of fish
The tropical gar (Atractosteus tropicus) is a large freshwater fish found in Central America. It is located in both Pacific and Atlantic drainage basins
Tropical_gar
Species of plant
where it can grow in soil, on rocks, or epiphytically on trees. It is facultatively deciduous in the dry season. "Philodendron warszewiczii K.Koch & C.D
Philodendron_warszewiczii
Genus of bacteria
of Gram-negative, oxidase-negative, aerobic, nonmotile, capsulated, facultatively anaerobic rods (formerly designated Klebsiella) in the family Enterobacteriaceae
Raoultella
Subfamily of bees
across its range, as well as between and within species and genera. Facultative eusociality has been observed in genera such as Augochloropsis and Megalopta
Halictinae
Killing of an infant individual by its siblings
can be either obligate or facultative. In obligate siblicide, a sibling almost always ends up being killed. In facultative siblicide, a sibling may or
Siblicide
Species of fungus
saprotrophically on leaf litter and fallen wood. It can, however, also be a facultative parasite of lichens and can additionally be a plant pathogen (typically
Athelia_arachnoidea
Genus of Gram-positive bacteria
grape-like clusters. Most species are non-motile, non-spore-forming, and facultatively anaerobic. The name derives from the Ancient Greek words σταφυλή (staphylē)
Staphylococcus
Species of bacterium
is a Gram-negative non-spore forming, rod-shaped bacterium. It is a facultative anaerobe capable of aerobic respiration. It is motile via peritrichous
Citrobacter_koseri
Species of bacterium
form of which is often lethal without treatment. It is a fastidious, facultative intracellular bacterium, which requires cysteine for growth. Due to its
Francisella_tularensis
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