NCERT Class 10 Science How do Organisms Reproduce Answers

Multiple Choice Questions

1. (b) 2. (c) 3. (c) 4. (a)
5. (d) 6. (c) 7. (a) 8. (a)
9. (d) 10. (a) 11. (b) 12. (b)
13. (b) 14. (c) 15. (b) 16. (d)
17. (b) 18. (c) 19. (c) 20. (b)
21. (d) 22. (c) 23. (d) 24. (b)
25. (c) 26. (a) 27. (b)

Short Answer Questions

28. The pistil is intact. Cross pollination has occurred leading to fertilisation and formation of fruit.

29. Yes, because it results in the formation of two daughter cells, that is, it results in the production of more individuals of the organism.

30. Clone refers to offspring of an organism formed by asexual method of reproduction. Since they possess exact copies of the DNA of their parent, clones exhibit remarkable similarity.

31. Reduction division (meiosis) during gamete formation halves the chromosome number in both male and female gametes. Since these two gametes fuse during fertilisation, the original number of chromosomes (as in the parent) is restored in the offspring.

32. Sugar provides energy for sustaining all life activities in yeasts. In water, it fails to reproduce because of inadequate energy in its cells.

33. Moisture is an important factor for the growth of hyphae. Moistened bread slice offers both moisture and nutrients to the bread mould, hence it grows profusely. Dry slice of bread offersnutrients but not moisture hence hyphae fail to grow.

Please refer to attached file for NCERT Class 10 Science How do Organisms Reproduce  Answers