SawaalBoxसवाल बॉक्स
2002 · Q11Science & TechnologyBiologyeasy

Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

  1. (a)Isolation
  2. (b)Mutation
  3. (c)Natural Selection
  4. (d)Sexual Reproduction
Show answerHide answer

Official answer(a) Isolation

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
Show answerHide answer

Official answer(c) 1 and 3 only