How do Organisms Reproduce?

HOW DO ORGANISMS REPRODUCE?

SHORT ANSWER TYPE QUESTIONS (SAQ)

1. What is the effect of DNA copying which is not perfectly accurate in the reproduction process? Answer : If DNA c...

SHORT ANSWER TYPES QUESTION (SAQ)

1. Answer the following: (i) Name the structures where spores are formed? Give the terms used for non-flagellated, non...

2. State the basic requirements for sexual reproduction? Write the importance of such reproduction in nature? Ans...

3. List six specific characteristics of sexual reproduction. Answer : Characteristics of sexual reproduction are...

4. How does reproduction helps in providing stability to population of species? Answer : The natural process of...

5. How is the process of binary fission different in Amoeba and Leishmania? Answer : In amoeba, binary fission c...

6. Answer the following questions: (i) Budding, fragmentation and regeneration, all are considered as asexual mode of...

7. How are spores produced in sporangia of Rhizopus? Answer : Spores are like small threads that grow on top of...

8. All multicellular organisms cannot give rise to new individuals through fragmentation or regeneration. Answer...

9. Can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?...

10. What happens when: (i) Planaria gets cut into two pieces. (ii) A mature Spirogyra filament attains considerable l...

11. Fallen leaves of Bryophyllum on the ground produce new plants whereas the leaves of rose do not. Explain this diffe...

12. What are the advantages of vegetative propagation? Answer : Some advantages of vegetative propagation are:...

13. Mohan was watching his mother cutting some potatoes into small pieces, each with one or two buds. These buds have s...

14. Why is variation beneficial to the species but not necessary for the individual? Answer : During the format...

15. How are the methods of reproduction different in unicellular and multicellular organisms? Answer : A single...

16. What is the importance of DNA copying in reproduction? Answer : Copying DNA is important because it allows...

17. How will an organism be benefited if it reproduces through spores? Answer : An organism can be benefited i...

18. Fertilization cannot take place in flowers if pollination does not occur. Answer : In flowering plants, the...

20. The central organ in a flower, shaped like a flask, is known as the carpel. It's also referred to as the female rep...

21. What are stamen and carpel a flower? What is the name of yellow powdery substance present in the anther of a flower...

22. Name the two reproductive parts of a bisexual flower which contain the germ cells. State the location and function...

23. Write one main difference between asexual and sexual mode of reproduction. Which species is likely to have comparat...

24. Answer the following questions: (i) What happens to the ovule and ovary after fertilisation? (ii) Which group ofp...

25. Answer the following questions: (i) Write the names of those parts of a flower which serve the same functions as t...

26. When a cell reproduces what happens to its DNA? Answer : Before reproduction, DNA is copied to produce two...

27. Newly formed DNA copies may not be identical at times. Give one reason. Answer : When DNA is copied, most o...

28. List the two types of reproduction. Which one of the two is responsible for bringing in more variations in its prog...

29. Name the following parts: (i) The organ where foetus develop during gestation period. (ii) A funnel like structur...

30. What are the advantages of sexual reproduction over asexual reproduction? Answer : The advantages of sexual...

31. What is the role of seminal vesicles and prostate glands? Answer : Seminal vesicles and prostate glands are...

32. Answer the following questions: (i) Trace the path of the sperms from where they are produced in the human body to...

33. Write the functions of each of the following parts in a human female reproductive system. (i) Ovary (ii) Uterus...

34. The embryo gets its nutrition from the mother's blood with the help of special tissue. (i) What is this special ti...

35. List four points of significance of reproductive health in a society. Name any two areas related to reproductive he...

36. What are different methods of contraception? Answer : The methods or devices used to prevent fertilisation a...

37. Answer the following questions: (i) Name the organ that produces sperms as well as secretes a hormone in human mal...

38. Name the hormones responsible for puberty. Answer : Puberty is the stage in life when a child's body develop...

39. How does the embryo get nourishment inside the mother's body? Answer : The baby inside the mother's womb re...

40. What are the changes seen in girls at the time of puberty? Answer : Changes seen in girls during puberty ar...

41. Why does menstruation occur? Answer : When the egg is not fertilized and the uterus hasn't received a fertil...

42. The sexual act always has the potential to lead to pregnancy. Pregnancy will make major demands on the body and the...

43. Hormones are powerful. It takes only a tiny amount to cause big changes in cells or even your whole body. That is w...

44. Answer the following questions: (i) A slide showing several amoeba was given to a student and was asked to focus th...

45. What could be the reasons for adopting contraceptive method? Answer : The reasons for adopting contraceptiv...

46. Answer the following questions: (i) List two sexually transmitted diseases in each of the following cases: (a) Ba...

47. Rajeev, a sales executive in a MNC was not keeping well for a long time. He underwent a complete medical check-up a...

48. Why is the number of sperms produced always more than the number of eggs produced? Answer : One ejaculation...

LONG ANSWER TYPES QUESTION (LAQ)

1. Define pollination. Explain the different types of pollination. List two agents of pollination. How does suitable pol...

2. Answer the following questions: (i) Draw the female reproductive part of a flower and label : (a) The part which is...

3. (i) Write the function of following parts in human female reproductive system: (a) Ovary (b) Oviduct (c) Uterus...

4. Study the following diagram and answer the following questions: (i) Label the parts A, B, C and D. (ii) Which parts...

5. What is vegetative propagation? List two advantages of using this technique. Answer : Many plants have the ability...

6. Name and explain the two modes of asexual reproduction observed in hydra. Answer : The two modes of asexual repro...

7. Describe the role of the following in a male reproductive system and label them in a figure: (i) Testis (ii) Vas...

NCERT SOLUTION

Page no: 128 1. What is the importance of DNA copying in reproduction? Solutio...

Page No. 133 1. How does binary fission differ from multiple fission? An...

Page No. 140 1: How is the process of pollination different from fertilization?...

2. What is the role of the seminal vesicles and the prostate gland? Answer : The seminal vesicles and p...

Page No. 141 1: Asexual reproduction takes place through budding in (a) amoeba (b)...