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environment

Which is artificially acquired active immunity?

Score: 4.6/5 (30 votes) Artificially acquired active immunity is protection produced by intentional exposure of a person to antigens in a vaccine, so as to produce an active and lasting immune response.Which is an example of artificially acquired active immunity?Vaccination is a form of artificial i...

Jan 19, 2026 • 523 READS

economics

What is the definition of severeness?

Score: 4.5/5 (9 votes) the quality of being difficult. used of the degree of something undesirable e.g. pain or weather. synonyms: badness, severity. types: foulness, raininess.Why does severity mean?: the quality or state of being severe They're determining the severity of the damage.What do y...

Jan 19, 2026 • 1,146 READS

global affairs

When was enstatite discovered?

Score: 4.8/5 (24 votes) Enstatite is a rare gemstone variety that belongs to the pyroxene group of minerals. It was first described in 1855 by G. A. Kenngott and was assigned its unusual name from the Greek words for 'resistor', in reference to its high melting point.Where is enstatite fou...

Jan 19, 2026 • 166 READS

economics

What is to rationalise?

Score: 4.3/5 (49 votes) In psychology rationalization or rationalisation is a defense mechanism in which controversial behaviors or feelings are justified and explained in a seemingly rational or logical manner in the absence of a true explanation, and are made consciously tolerable—or even admirabl...

Jan 19, 2026 • 1,498 READS

education insights

Should data be normalized before pca?

Score: 4.8/5 (70 votes) Yes, it is necessary to normalize data before performing PCA. The PCA calculates a new projection of your data set. ... If you normalize your data, all variables have the same standard deviation, thus all variables have the same weight and your PCA calculates relevant axis.Wh...

Jan 19, 2026 • 1,130 READS

science

Are fossils rare in precambrian rocks?

Score: 4.4/5 (25 votes) Fossils are rare in Precambrian rocks, probably because Precambrian life-forms lacked bones, shells, or other hard parts that commonly form fossils. ... Of the few Precambrian fossils that have been discovered, the most common are cyanobacteria in stromatolites, or layered, r...

Jan 19, 2026 • 1,900 READS

economics

Is la redoute french?

Score: 4.3/5 (47 votes) La Redoute is a French multi channel retailer founded by Joseph Pollet in 1837. ... Its e-commerce site is the top ranked French site for apparel and home decor, with more than 7 million unique visitors each month. The company operates in 26 countries and has more than 10 mil...

Jan 19, 2026 • 1,798 READS

environment

What is meant by lithophile?

Score: 4.2/5 (25 votes) : tending to be concentrated in the silicate outer shell of the earth uranium is a typical lithophile element — Journal of Geology.Where is the lithophile found?They have been detected in rocks down to depths of nearly three km, where the temperature is approximately 75 °C. T...

Jan 19, 2026 • 413 READS

global affairs

Where is indwelling catheter?

Score: 4.9/5 (65 votes) An indwelling urinary catheter is one that is left in the bladder. You may use an indwelling catheter for a short time or a long time. An indwelling catheter collects urine by attaching to a drainage bag.What is an indwelling catheter?An indwelling urinary catheter is inserte...

Jan 19, 2026 • 185 READS

global affairs

What is a working mans club?

Score: 4.2/5 (59 votes) Working men's clubs are a type of private social club first created in the 19th century in industrialised areas of the United Kingdom, particularly the North of England, the Midlands, Scotland and many parts of the South Wales Valleys, to provide recreation and education...

Jan 19, 2026 • 950 READS