SawaalBoxसवाल बॉक्स
2011 · Q18Science & TechnologyBiologymoderate

When the bark of a tree is removed in a circular fashion all around near its base, it gradually dries up and dies because

  1. (a)Water from soil cannot rise to aerial parts
  2. (b)Roots are starved of energy
  3. (c)Tree is infected by soil microbes
  4. (d)Roots do not receive oxygen for respiration
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Official answer(b) Roots are starved of energy

2020 · Q47Science & TechnologyBiologyeasy

Which of the following statements are correct regarding the general difference between plant and animal cells ? 1. Plant cells have cellulose cell walls whilst animal cells do not. 2. Plant cells do not have plasma membrane unlike animal cells which do. 3. Mature plant cell has one large vacuole whilst animal cell has many small vacuoles. Select the correct answer using the code given below :

  1. (a)1 and 2 only
  2. (b)2 and 3 only
  3. (c)1 and 3 only
  4. (d)1, 2 and 3
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Official answer(c) 1 and 3 only