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Heredity and Evolution (Question Answer)

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  Heredity and Evolution (Question Answer) QUESTIONS 1. If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?  Answer: B trait has arisen earlier because it exists in maximum population. 2. How does the creation of variations in a species promote survival? Answer:  The variations created in a species protects the organism from extinction even in adverse conditions. As a result, the organism gains stability. Helps to adapt to the changing environment of the natural environment. 3. How do Mendel’s experiments show that traits may be dominant or recessive?  Answer:  Mendel used a number of contrasting visible characters of garden peas – round/wrinkled seeds, tall/short plants, white/violet flowers and so on. He took pea plants with different characteristics – a tall plant and a short plant, produced progeny from them, and calculated the percentages of tall or short pr
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ACIDS, BASES AND SALTS (QUESTION ANSWER)

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  ACIDS, BASES AND SALTS  (QUESTION ANSWER) QUESTIONS 1. You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube? Answer:   When t he red litmus paper was dipped one after another in the solutions in the three test tubes, the liquid that will make the red litmus paper blue will be basic. This blue litmus paper can now be used for acid testing. If  this blue litmus paper is dipped one after another in  the remaining two samples, the liquid which will change its color to red will be acid and the liquid which can not change the color of the blue litmus paper will be distilled water. 2. Why should curd and sour substances not be kept in brass and copper vessels? Answer:  Curd and sour foods are acidic. Brass and copper are metals. These acids react with brass and copper to form poisonous salt
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