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ASSIGNMENT QUESTIONS SET-1, CHAPTER-8, , HOWDO ORGANISMS REPRODUCER, 1. Define reproduction., , 2. Define fertilization., 3. Where the fertilization does takes place in human female?, 4. Name two type of reproduction., , 5. What method will you use for growing jasmine and rose plant?, , 6. Define menstruation., 7. Write the name of male and female reproductive part of a flower., , 8. Define gestation period. What is the gestation period in human?, 9. Why do testes in mammals descend in scrotum?, 10. Namc the typc of fission carricd out by Amocba., , 11. Name two sexually transmitted diseases., , 12. What is vegetative propagation?, 13. Name the male and female gonads and what are the products they produce., , 14.Which part of human female reproduction system is called-birth canal and the-womb?, 15. Write the full form of IUCD and AIDS., 16. What is, , syngamy?, , 17. What is advantage of fruit formation in plant?, , 18. What is ovulation?, 19. What is menopause?, , 20. What is the importance of the process of reproducion?, 21. What is species?, , 22. Do organisms produce exact copies of themselves during reproduction?, 23. What is the importance of variations?, 24. Why is variation beneficial to the species but not necessarily for the individuals?
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25. What is the importance of DNA copying in reproduction?, 26. What are the different methods of asexual reproduction?, 27. Name the following, An organism which reproduces by, , a. Binary fission, b. Multiple fission, c. Budding, , K, , d. Fragmentation, e. Spore Formation, 28. How does binary fission in amoeba differ from binary fission in Leishmania?, 29. How will an organism be benefitted if it reproduces through spores?, 30. Can you think of reasons why more complex organisms cannot give rise to new individuals, , through regeneration?, 31. Why is vegetative propagation practised for growing some types of plants?, 32. What are the advantages of sexual reproduction over asexual reproduction?, , 33. What is asexual reproduction? Explain briefly various methods of asexual reproduction?, 34. How is specific chromosome number maintained in a sexually reproducing organism?, 35. Draw and label the parts of a flower., 36. What are the functions of the following parts of a flower?, 37. What is pollination?, , 38. What are the steps involved in fertilization and formation of seeds?, 39. What are the secondary sexual characteristics seen in males?, 40. Why are the testis located outside the abdominal cavity in the scrotum?, 41. Draw the female reproductive system and label the parts., , 42. What is ovulation?, 43. Draw the longitudinal section of pistil to show pollen grains' germination., 44. List the events after fertilization in an angiosperm takes place., 45. Draw the male reproductive system and label the parts., 46. What is the role of the seminal vesicles and the prostate glands?, 47. What are the changes seen in females at the time of puberty?
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48. What happens when the egg is not fertilized?, 49. How does the embryo get nourishment inside the mother's body?, 50. What are the functions performed by the testis in males?, 51. How are the modes of reproduction different in unicellular and multi-cellular organisms?, , 52. How does reproduction help in providing stability to population of species?, 53. What could be the reasons for adopting contraceptive methods?, 54. What is the importation of DNA copying in reproduction?, , 55, Why is variation beneficial to the species but not necessarily for the individual?, 56. How will an organism be benefited if it reproduces through spores?, 57. Can you think of reasons why more complex organisms cannot give rise to new individuals, , through regeneration?, 58. Why vegetative reproduction is practiced for growing some type of plants?, , 59. Why is DNA copying an essential part of the process of reproduction?, 60. What are the changes seen in girl's at the time of puberty?, , 61. What is the role of the seminal veaicles and the prostate gland?, 62. How is the process of pollination different from fertilization?, , 63. How does the embryo get nourishment inside the mother's body?, 64. Show by a series of labeled diagram, the manner in which reproduction in Hydra., 65. Describe regeneration., 66. Define the terms unisexual and bisexual flowers by giving one example of each., , 67. Leaves of the bryophyllum fallen on the ground produce new plants whereas the leaves of, rose donot. Why?, 68. Why does menstruation occur?, 69. How does reproduction help in providing stability to populations of species?, 70. What is advantages of sexual reproduction over asexual reproduction?, 71. What are function perfomed by testis in human beings.?, 72. Differentiate between natural and artificial vegetative propagation.
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73. Draw a diagram of a flower to show its male and female reproductive parts. Label on it : a.-, , the ovary b- the anther c- the filament d- the stigma., 74. Desribe the fertilization in flower., 75. What is meant by pollination? How it takes place?, 76. What is 'vegetative propagation'? Write two examples where it is used. State two reasons, of practicing vegetative propagation for giving same types of plants., , 77. Illustrate the following with the help of suitable diagram: a) Regeneration in Planaria. b), Budding in Hydra., , 78. Describe why : a) Scrotum remains outside the body of human males ? b) Some plants are, , propagated only by vegetative propagation?, 79. How does reproduction help in providing stability to populations of species?, 80. Describe the changes taking place in female reproductive organs every month, 81. What will happen if ovum is not fertilized? Describe the events in a sequence wise manner., , 82. How do following organisms reproduce? a)Amoeba b) Planaria c) Yeast d) Frog e)Rose, ) Bacteria, , Abhyas tutorinl. Panaj
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ASSIGNMENT QUESTIONS SET-2, CHAPTER-8, , HOWDO ORGANISMS REPRODUCE?, 1. Mention the common mode of reproduction found in (i) Amoeba (i) Planaria., , 2. Name any two types of asexual reproduction., 3. Define reproduction., , 4. Name two organisms that show asexual reproduction., 5. How does Hydra reproduce? Name another organism that reproduces by a similar method., 6., , 7., , What is, , spore?, Name two plants which reproduce through spores., a, , 8. Why is regeneration considered a method of reproduction?, C a, , 9. Which vegetative part is used in the propagation of Bryophyllum and min?, 10. Name two types of layering., , Utorial, , 11. Name some plants where layering is used., , 12. Which technique would you use for propagating improved varieties of mango and rose?, 13. Name various types of asexual reproduction., 14. Mention the reproductive parts of a flower., , r18, , 15. Define fertilisation., 16. What is self-pollination?, 17. What is cross pollination?, 18. What, , are, , the agents of polliuauon?, , 19. Which process results in, 20. What grows to form, , a, , formation ofzygote?, , fnuit?, , 21. What is carpel?, , 22. Which parts ofthe flower transfom into the sccd and fruit?, 23. What are, , 24. What, , gonads, , ispuberty?, , 25. When is oyum released in human female?, 26. What is endometrium?, 27. What is implantation?, 28. What is, , parturition?, , 29. What is ovulation?, 30. Where are the ova produced in woman?, 31. Name two sex homones., 32. What is the normal reproductive life in human female?
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33. What are oral contraceptives?, 34. What is epididymis?, , 35. What are the functions of urethra?, 36. What are the secondary sex characters in human male?, 37. Why do testes lie outside the abdominal cavity?, 38. When does puberty occur in human male and female?, 39. State the methods used for growing rose plants., , 40. State what type of method is used for growing jasmine plant., 41. Name the hormone, secretion of which is responsible for dramatic changes in appearance in, girls when they approach 10-12 years of age., , 42. The organisms fomed by asexual reproduction are considered as clones. Why? State the, advantage of sexual reproduction over asexual reproduction, , 43. What is the effect of DNA copying which is not perfectly accurate on the reproduction, , process?, 44. How does the process of budding differ fromthe process of spore formation?, 45. Name the type of asexual reproduction in: (a) Planaria (b) Rhizopus ii) Spirogyra (iv), , Hydra, 46. With the help of a diagram only showregeneration in Planaria. Regeneration is not, possible in all types of animals. Why?, , 47. How does the process of seed germination take place in plants? Describe in brief., 48. Name the sex hormones secreted by male and female sex organs in human beings. State, one function of eaçh., , 49. State the mode of reproduction in following organisms : Earthworm, Frog, Rhizopus,, , Plasmodium(Oy, 50. State in'brief any two functions of copper-T used by some women., 51. In what respect is the human male gamete different from the female gamete?, 52. What is reproduction? What are its two types? Which one of the two confers new, characteristics on the offsprings and how?, 53. What is binary fission? Draw a diagram to show binary fission in Amoeba., , 54. What is regeneration? State a reason why a more complex organism cannot give rise to new, individuals through this method., 55. Name the male and female gametes in animals. What is fertilisation and where does it take, place in human females?, , 56. What is _reproduction ? Mention the importance of DNA copying in reproduction.
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57. Mention the information source of making proteins in the cell. What is the basic event in, reproduction?, 58. Name one sexually transmitted disease each caused due to bacterial infection and viral, infection. How can these be prevented?, , 59. Describe briefly four ways in which individuals with a particulartrait may increase ina, , population., 60. Why is it said that -sexual reproduction promotes diversity of characters in the offspring?, 61. Why cannot fertilisation take place in flowers if pollination does not occur?, , 62. Why does bread mould grow profusely on a moist slice of bread rather than ona dry slice, of bread?, 63. Leaves of Bryophyllum fallen on the ground produce new plants whereas the leaves of, Jasmine do not, why?, , 64. What is clone? Why do offspring formed by asexual reproduction exhibit remarkable, , similarity?, 65. Write one disadvantage of asexual reproduction. Whenand how does multiple fission take, place?, 66. State in brief the function of the following organs in the human female reproductive, , system. (a) Ovary (b) Fallopian tube, , orus, , 67. Differentiate between: (a) Asexsualandsexual reproduction. (b) Plumule and Radicle (c), Pollination and Fertilisatior, 68. Why is vegetative propagatuon practised for grow1ng some types of plants? (6) Name the, different parts of a flower that has germ cells. (c) List any two agents of pollination., 69. What happens to the pollen which falls on a suitable stigma? Explain., 70. List and describe in brief any three ways devised to avoid pregna, , 71. What are sexually transmitted diseases? Name four such diseases. Which one of them, , damages the immune system of human body?, 72. Define grafting. Suggest any two advantages and disadvantages of grafting., 73. Name any two mechanical barriers of pregnancy. What are the benefits of using, mechanical barriers during sexual act?, 74. State in brief the functions of the following parts of the human male reproductive system, ) Scrotum (i) Testes (ii) Vas deferens, , 75. State the role of ovary and fallopian tube in human body., 76. What could be the possible reason for declining female to male sex ratio in our country., Suggest two measures to achieve 1:1 ratio., 77. What is the advantage of reproducing through spores?
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78. How does variation lead to the survival of species overtime?, , 79. What ill happen when:, (a) A mature Spirogyra filament attains considerable length?, b) Planaria gets cut into two pieces?, 80. (a) Give reason: Regeneration is not the same as Reproduction., (b) State the mode of a asexual reproduction in Plasmodium, 81. (a) Surgical methods can be used to create a block in the reproductive system for, contraceptive purposes. Name such parts where blocks are created in G) males (i) females, b) State any two reasons for using contraceptive devices., 82. (a) What is vegetative propagation?, (b) Write any two advantages of practising this method., , 83. (a) Out of the following plants which two plants are reproduced by vegetative, , propagation? jasmine, wheat, mustard, banana, (b) List any one advantage of practising this kind of propagation., 84. (a) Identify the asexual method of reproduction in each of the following organisms : (i) rose, , (i) yeast (ii) planaria, (6) What is fragmentation? Namea multicellular organism which reproduces by this, method., , 85. (a) How do the oral pills function as contraceptives?, (b) The use of these pills may be harmful. Whv?, 86. (a) Explain the terms: (i) implantation (ii) placenta, (b) What is the average duration of human pregnancy?, 87. (a) Why do testes located in scrotum outside the abdominal cavity?, (b) What will happen to ovary and ovule after fertilization in angiospermic plants., 88. In a bisexual flower inspite of the young stamens being removed artificially, the flower, produces fruit. Give reasons., (a) Name the parts of the flower which ripens to form fruit and seed?, (b) In the following diagram label A and B., , A, B
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35. Would a Planaria cut vertically into two halves regenerate into two individuals? Complete, the below Figure D and E by indicating the regenerated regions., , A, , B, , C, , D, , E, , 36. From the internet, gather information about the chromosome numbers of five animals and, five plants. Corelate the number with the size of organism and answer the following, , questions., (a) Do larger organisms have more number of chromosomes/cells?, (b) Can organism with fewer chromosomes reproduce more easily than organisms with, more number of chromosomes?, (c) More the number of chromosomes/cells greater is the DNA content. Justify., 37. In tobacco plant, the male gametes have twenty four chromosomes. What is the number of, chromosomes in the female gamete? What is the number of chromosomes in the zygote?, , 38. Why cannot fertilisation take place inflowers if pollination does not occur?, 39. Is the chromosome number of zygote, embryonal cells and adult of a particular organism, always constant? How is the constancy maintained in these three stages?, 40. Where is the zygote located in the flower after fertilization?, 41. Reproduction is linked to stability of population of a species. Justify the statement., 42. How are general growth and sexual maturation different from each other?, , 43. Trace the path of sperm during ejaculation and mention the gland and their functions, associated with the male reproductive system., , 44. What changes are observed in the uterus if fertilisation does not occur?, 45. What changes are observed in the uterus subsequent to implantation of young embryo?, 46. What are the benefits of using mechanical barriers during sexual act?, 47. In the given below Figure label the parts and mention their functions, , (a) Production of egg, (b) Site of fertilisation, , (c)Site ofimplantation, (d) Entry of the sperms
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48. What would be the ratio of chromosome number between an egg and its zygote? How is, the sperm genetically different from the egg?, , 49. Why are budding, fragmentation and regeneration all considered as asexual types of, reproduction? With neat diagrams explain the process of regeneration in Planaria., , 50. Write two points of difference between asexual.and sexual types of reproduction. Describe, , why variations are observed in the offspring formed by sexual reproduction., 51. Distinguish between pollination and fertilisation. Mention the site and product of, fertilisation in a flower., , 52. Draw a neat, labelled diagram of a pistil showing pollen tube growth and its entry into the, ovule., , 53. Distinguish between a gamete and zygote. Explain their roles in sexual reproduction., 54. Draw the diagram of a flower and label the four whorls. write the names of gamete, producing organs in the flower., 55. What is placenta? Mention its role during pregnancy?, 56. What are various ways to avoid pregnancy? Elaborate any one method., , 57. What are placenta ? Explain its structure and function., 58. How does fertilisation take place? Fertilisation occurs once in a month. Comment., , 59. Reproduction is essentially a phenomenon that is not for survival of an individual but for, , the stability of a species. Justify., 60. Describe sexually transmitted diseases and mention the ways to prevent them.
