Ans. ‘In fact, the evolutionary pathway from obligate outcrossing based on self-sterility to predominant self-fertilization is among the most common and widespread trends in flowering plants.’ ‘This was accomplished by isolating single-conidium cultures from each progeny and testing for self-sterility … Various agents are used as a sterilizing agent such as liquid chemicals or gases, elevated temperature, ionizing radiation. sterility - the state of being unable to produce offspring; in a woman it is an inability to conceive; in a man it is an inability to impregnate infertility physical condition , physiological condition , physiological state - the condition or state of the body or bodily functions In theory, his idea was sound, but scientists long debated whether it actually happened in nature. Farlex Trivia Dictionary. In order to assure this balance, the process definition and validation approach utilized must incorporate both lower and upper limits on the process conditions in order to assure PRECAUTIONS AGAINST MICROBIAL CONTAMINATION The test for sterility is carried out under aseptic conditions. Sterile definition, free from living germs or microorganisms; aseptic: sterile surgical instruments. impotence, sterility - Impotence is the male's inability to copulate or get an erection; sterility is the inability of either a male or female to procreate. In plants this is usually termed self-incompatibility (see incompatibility). In order to achieve such conditions, the test environment has to be adapted to … Q. hybrid sterility (noun) a situation in which a mating between two individuals creates a hybrid that is sterile Postzygotic mechanisms include hybrid inviability, hybrid ~TildeLink() and ... CallUrl('www>brightstorm>combiology-questions-and-answers>comhtml',1), In an individual carrying an abnormal number of X chromosomes, cellular mechanisms will inactivate all but one X in each of her cells. Definition Heterochrony refers to any change in the developmental timing of an organism's growth that results in changes between ancestor and descendant species; or between different members of a … Sterile or sterility may refer to: Asepsis, a state of being free from biological contaminants Sterile (archaeology), sediment containing no evidence of human activity Sterilization (microbiology), any process that eliminates or kills all forms of life from an item or field ^ Ramsey, Justin; Schemske, Douglas W. (November 1998). CallUrl('www>kumc>eduhtml',0). CallUrl('opentextbc>catalkorigins>orghtml',0), Offspring inviability or ~TildeLink():All that courting and mating is wasted if the offspring of matings between the two groups do not survive or cannot reproduce. Fertility and ~TildeLink(), 94(3), 795-825. doi: 10.1016/j.fertnstert.2009.03.079 ... CallUrl('learn>genetics>utah>edubio-medicine>orgmagnet>fsu>eduhtml',0), Hybrid - The offspring of parents of two different species. Alternatively, the transgenes can be engineered into chloroplasts, which are inherited maternally only. sterility – definedas the total absence of microorgan-isms – is not possible for the reason mentioned earlier and thus cannot be guaranteed. genetic male sterility, cytoplasmic male sterility and cytoplasmic genie male sterility. PMC 2628965 . Self-sterile definition is - sterile to its own pollen or sperm. CallUrl('www>informatics>jax>orgshtml',0), Sterility if testes do not descend during developmentSpermatogenesis occurs in walls of seminiferous tubules (→compartment of testes)Sperm are passively carried to the epididymisNetwork of seminiferous tubules → leads into vas deferensSperm acquire ability to swim and are stored ... CallUrl('www>biologyguide>nethtm',0), Fertility - The ability to produce gametes capable of creating zygotes. Its deficiency may cause ~TildeLink(), spontaneous abortions and muscle dystrophy. Sterility can be defined as the freedom from the presence of viable microorganisms. sterilitynoun[U](UNABLE TO PRODUCE) (in animalsand people) the conditionof being unableto produceyoung, or (in plants) the conditionof being unableto produceplantsor crops. In order to achieve such conditions, the test environment has to be adapted to … Please help improve it or discuss these issues on the talk page. Biological Indicators (BIs) are widely used to monitor the efficacy of sterilization processes. Study Force - Problem Solved is the leading provider of online homework help for college and high school students. However, the conditions that guarantee absolute sterility are usually too harsh for active ingredients, and the definition of sterility for a medicinal product must be defined in functional terms. What is what? Learn vocabulary, terms, and more with flashcards, games, and other study tools. Another possibility is breeding male ~TildeLink() in transgenic plants. heteromorphic system and homomorphic system. ADVERTISEMENTS: Q. Sterility can be defined as absence of viable Microorganism. CallUrl('newatlas>comberkeley>eduwikipedia>orgnetcourse-notes>orgbiology-online>orgicoachmath>comhtml',0), Symptoms: tall stature (over 6'), may including ~TildeLink(), developmental delay, learning problems. © … As a result, X-chromosomal abnormalities are typically associated with mild mental and physical defects, as well as ~TildeLink(). CallUrl('www>sparknotes>com >! About us, add a link to this page, or ( in plants ) the… - An organism is! 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Using various biological, chemical, or ( in animals and people ) the condition being... And muscle dystrophy, deformity, or ~TildeLink ( ) - the opposite of both fertility and fecundity, free.