Description : The origin of a new species first requires A) reduced gene flow. B) increased gene flow. C) reduced mutation rates. D) increased mutation rates.
Last Answer : A) reduced gene flow.
Description : Chemical or physical agent which greatly enhances the frequency of mutation.
Last Answer : Ans. Mutagen
Description : The increased number and density of species in the region of ecotone is called
Last Answer : The increased number and density of species in the region of ecotone is called A. Edge effect B. Sympatric speciation C. Dominance D. Abundance
Description : Answer: a, b, c, d Free oxygen radicals are chemical species that are intermediates in the normal process of cellular respiration. Oxidants that are free radicals have been implicated as initiators of ... a. C-reactive protein b. Serum amyloid c. a -Proteinase inhibitor d. Fibrinogen e. Albumin
Last Answer : Answer: a, b, c, d The acute-phase response is a series of homeostatic responses of the organism to tissue injury in infection and inflammation. After an inflammatory stimulus occurs, a number ... 30% to 50% of the level before injury. The reason for the decrease in production is poorly understood
Description : A catalyst in a chemical reaction (A) Decreases the activation energy (B) Alters the reaction mechanism (C) Increases the frequency of collisions of reacting species (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Widespread and prolonged use of an antibiotic leads to emergence of drug resistant strains because antibiotics: A. Induce mutation in the bacteria B. Promote conjugation among bacteria C. Allow resistant strains to propagate preferentially D. All of the above
Last Answer : C. Allow resistant strains to propagate preferentially
Description : Atropine overdose may cause which one of the following (a) Gastrointestinal smooth muscle crampine (b) Increased cardiac rate (c) Increased gastric secretion (d) Pupillary constriction (e) Urinary frequency
Last Answer : Ans: B
Description : The rating of the Transformer __ when the supply frequency is increased: a) Remains unchanged b) Increases c) Decreases d) None of the above
Description : Respiratory acidosis is that in which the blood pH is low due to increased retention of carbon dioxide caused by the lowering of the respiratory frequency or by pulmonary diseases that impair ... caused by metabolic disturbances that increase the concentration of bases (alkalis) in the blood.
Last Answer : Where are the chemoreceptors that detect the acidity of the blood and trigger the respiratory compensation located?
Description : The pulmonary ventilation frequency (number of inhalations per time unit) rises or lowers the carbon dioxide concentration in blood. If it is intense the gas is more eliminated to the exterior and if it ... carbon dioxide and also of more hydrogen ions spending and the pH of the solution is raised.
Last Answer : What are acidosis and alkalosis?
Description : Which of the following is least likely to be an effect of global warming? (1 ) Increased frequency of hurricanes (2) Loss of fertile delta region as for agriculture (3) Decreased rate of photosynthesis in vegetation (4) Shrinking of the polar ice regions
Last Answer : (3) Decreased rate of photosynthesis in vegetation Explanation: Global warming is the current increase in temperature of the Earth's surface (both land and water) as well as it's atmosphere. ... . However, the gradual heating of Earth's surface, oceans and atmosphere will not affect photosynthesis.
Description : If the length of an antenna is changed from 2.5 meters to 2.8 meters, its resonant frequency will A. increase B. depend on the velocity factor so the resonant frequency can either be increased or decreased C. will be unchanged D. decrease
Last Answer : D. decrease
Description : If the length of a Hertz dipole is decreased A. its resonant frequency will be lowered its distributed inductance will be increased B. its distributed inductance will be decreased C. its ... frequency will be increased D. its distributed capacitance between the antenna and ground will be increased.
Last Answer : C. its resonant frequency will be increased
Description : Why are frequency modulation transmitters more efficient? A. Because their power is increased by class C amplifiers B. Because their power is increased by class A amplifiers C. Because their power is increased by class B amplifiers D. Because their power is increased by class AB amplifiers
Last Answer : A. Because their power is increased by class C amplifiers
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the mass of the system is increased? A The frequency will increase B The frequency will stay the same C The frequency will decrease D None of these
Last Answer : C The frequency will decrease
Description : What is the effect on the undamped natural frequency of a single-degree-of- C freedom system if the mass of the system is increased? ( A ) The frequency will increase ( B ) The frequency will stay the same ( C ) The frequency will decrease ( D ) None of these
Last Answer : ( C ) The frequency will decrease
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the stiffness of one or more of the springs is increased? (A) The frequency will increase (B) The frequency will stay the same (C) The frequency will decrease (D) None of these
Last Answer : (A) The frequency will increase
Description : What is the effect on the undamped natural frequency of a single-degree-of-freedom system if the mass of the system is increased? A) The frequency will increase (B) The frequency will stay the same (C) The frequency will decrease (D) None of these
Last Answer : (C) The frequency will decrease
Description : The reaction rate almost gets doubled for 10°C rise in temperature. This is due to the fact that the (A) Increased temperature reduces the activation energy (B) Fraction of molecules having threshold energy increases (C) Collision frequency increases (D) Value of threshold energy decreases
Last Answer : (B) Fraction of molecules having threshold energy increases
Description : The obstructive and irritative symptom complex caused by benign prostatic hypertrophy is termed a) prostatism. Symptoms of prostatism include increased frequency of urination, nocturia, urgency, dribbling, ... . d) prostatectomy. Prostatectomy refers to the surgical removal of the prostate gland.
Last Answer : a) prostatism. Symptoms of prostatism include increased frequency of urination, nocturia, urgency, dribbling, and a sensation that the bladder has not completely emptied.
Description : For individuals known to be dying by virtue of age and/or diagnoses, which of the following signs indicate approaching death: a) Increased restlessness As the oxygen supply to the ... Increased urinary output Based upon decreased intake, urinary output generally decreases in amount and frequency.
Last Answer : a) Increased restlessness As the oxygen supply to the brain decreases, the patient may become restless.
Description : For V/F control, when frequency is increased in transformer a) Core loss component current increases, Magnetizing component current decreases b) Core loss component current increases, ... component current decreases d) Core loss component current decreases, Magnetizing component current increases
Last Answer : Ans: Core loss component current decreases, Magnetizing component current decreases
Description : What happens to the bus bar dimensions of the waveguide when the frequency is increased?
Last Answer : The bus bar becomes wider.
Description : If the inductor and capacitor values are increased, what happens to the resonant frequency?
Last Answer : Decreases.
Description : How can the frequency range of a collinear array be increased?
Last Answer : By increasing the lengths of the elements of the array.
Description : The frequency of voltage generated, in case of generators, can be increased by (a) using reactors (b) increasing the load (c) adjusting the governor (d) reducing the terminal voltage (e) none of the above
Last Answer : (c) adjusting the governor
Description : 64)During the short-circuit test on a small transformer the frequency is increased from 50-200Hz. The copper losses will increase by a factor of A. 16 B. 4 C. 1 D. 1/4
Last Answer : A) 16
Description : Which of the following is least likely to be an effect of global warming? (1) Increased frequency of hurricanes (2) Loss of fertile delta region as for agriculture (3) Decreased rate of photosynthesis in vegetation (4) Shrinking of the polar ice regions
Last Answer : Decreased rate of photosynthesis in vegetation
Description : If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then: A) both hysteresis loss and eddy current loss in the core will increase B) ... current loss will increase D) hysteresis loss will decrease but eddy current loss will remain unchanged
Last Answer : If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then: hysteresis loss will decrease but eddy current loss will remain unchanged
Description : The output power of a filter is 100 mW, when the signal frequency is 6 kHz. When the frequency is increased to 25 kHz, the output power falls to 50 mW. What is the dB change in power ? (a) -3 dB (b) -5 dB (c) -7 dB (d) -2 dB
Last Answer : The output power of a filter is 100 mW, when the signal frequency is 6 kHz. When the frequency is increased to 25 kHz, the output power falls to 50 mW. What is the dB change in power ? -3 dB
Description : A chopper operating at a fixed frequency is feeding an R-L load. As they duty ratio of the chopper is increased from 25% to 75%, the ripple in the load current.
Last Answer : Remains constant.
Last Answer : If the supply frequency to the transformer is increased, the iron loss will increase.
Description : What is a mutation?
Last Answer : A mutation is a change in the DNA sequence that can result in a change in the protein produced or the function of the gene.
Last Answer : A: A mutation is a change in the DNA sequence of an organism, often caused by errors during DNA replication or exposure to mutagens such as radiation or chemicals.
Last Answer : A: A mutation is a change in the DNA sequence that can result in a different protein or RNA molecule being produced.
Description : What is the difference between a mutation and a variation?
Last Answer : A: A mutation refers to a permanent change in the DNA sequence, while a variation refers to any difference in the physical or genetic traits of an organism.
Description : What is the difference between a mutation and a genetic variation?
Last Answer : A: A mutation is a change in the DNA sequence, while genetic variation refers to differences in the DNA sequence between individuals in a population.
Description : Which insect or animal mutation would you care to deal with if man created?
Last Answer : answer:Instead of answering, I will “question the question”...do I have to choose? Seriously. All of these choices sound horrible.
Description : Technical virology questions about ERVs and RNA vs. DNA viral rates of mutation?
Last Answer : You’re going to make me dig out my old biochemistry texts for this one. Don’t have time now but I’ll do it when I get home from work.
Description : What X-Men style mutation do you think would suit you best?
Last Answer : With my personality, I think a more “cerebral” mutation would fit me best. I wouldn’t do well with enhanced strength or speed. Probably something like Professor Xavier’s telepathy, Jean Grey’s telekinesis, or the ability to heal.
Description : Viruses can undergo mutation. What does it mean? -Biology
Last Answer : answer:
Description : What is gene mutation? -Biology
Description : Explain Frameshift mutation? -Biology
Description : What is point mutation? Give examples. -Biology
Description : Difference between a mutation and a mutagen -Biology
Description : Difference between somatic and germline mutation -Biology
Description : How does DNA polymerase prevent mutation?
Last Answer : It checks DNA for errors during replication.
Description : A point mutation occurs in a sex cell of an adult chimpanzee. The mutation is located on a gene responsible for the development of the eye. Which describes the most likely effect of this mutation?
Last Answer : The chimpanzee's offspring will have abnormal eyes.