SawaalBoxसवाल बॉक्स
2002 · Q127Science & TechnologyBiologymoderate

Which one of the following statements is correct?

  1. (a)All echinoderms are viviparous
  2. (b)Round worm has no circulatory system
  3. (c)In bony fishes, swim bladder is usually present
  4. (d)In cartilaginous fishes, fertilisation is internal
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Official answer(a) All echinoderms are viviparous

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