2nd Year Biology Chapter 18 Reproduction Notes MCQs Bank Solution

biology 12th notes chapter 18

1. Developling seed are rich sourse of;


2. It is type of recemose inflorescence that is flat-topped or convex because theouter pedicels are progressively longer than the inner ones. 


3. The animals which lay eggs are called


4. The type of recemose inflorescence with a short axis and multiple floralpedicels of equal length that appear to arise from a common point is called


5. In gymnosperms male gametophyte develops from


6. Fraternal twins


7. Fertilization of human eggs most often takes place in the


8. Evolution of pollen tube is parallel to the evolution of


9. Oviduct is generally caled as:


10. Which one of the following is a type of asexual reproduction:


11. The mature female gametophyte of an angiosperm is


12. Which part ultimately matures into a fruit? 


13. In which type of inflorescence flowers are covered by large bracts calledspathes


14. Reproduction of egg without fertilization by sperm is termed as


15. Development of an egg into Embryo without fertilization is called as:


16. The part of embryo just above the cotyledons that terminates into plumule iscalled


17. In human how many ova are usually discharged from overy at one time 


18. The production of new plants from underground stems is an example of


19. A type of sygnamy in which both fusing gametes are flagellated and same insize are known as


20. In mammals that are seasonal breeders, females are receptive only once ayear.This is called


21. From life cycle point of view the most important part of a plant is


22. Spinach is


23. Fruit ripening is often accompanied by a burst of respiratory activity called:


24. The part of embryo just below the cotyledons that terminates into radicle iscalled


25. In angiosperms, double fertilization produces two distinct portions of theseed.The endosperm portion’s role is to


26. It has been found that red light promotes flowering in


27. The fertilization occurs in


28. Reproductiom is necessary for the survival of 


29. The release of ovum from the ovary is called


30. Which of the following is part of the third whorl of flower? 


31. The end or complete stop of the menstrual cycle is called:


32. Gonorrhoa is caused by:


33. Epigeal germination takes place due to rapid growth of


34. A type of uniparous cyme in which succeeding branches are produced onsame side is termed as


35. The animals that lay shelled eggs to protect the developing embryo from harsh terestrial conditions are called:


36. A type of uniparous cyme in which succeeding branches are produced onalternate sides is termed as


37. In mammalian males, the reproductive and excretory system share the same


38. The process by whichbecomes embedded in endometrium is called .


39. The first organ to emerge from the germinating seed is


40. A human female has around how many oocytes in each of her ovary? 


41. A special type of reproduction in which seed starts germinating inside fruit is


42. What controls the release of milk form the mammary glands?


43. A pollen grain is


44. Natural methods of asexual reproduction in plants is/are


45. What is produced mainly by the corpus luteum in the ovary followingovulation?


46. The main embryo develops from the structure formed as a result of fusion of


47. The stamens are leaves modified for the production of


48. The transfer of pollen grains to the female part of the plant is called


49. The lining or inner layer of the uterus is called the


50. Which of the following is formed in the double fertilization and becomes anendosperm? 


51. The ovule contains


52. In apomixis, an embryo is created from a diploid cell in the


53. What is advantage of asexual reproduction? 


54. After meiosis,what differentiaes into the mature sperm? 


55. Duckbill platypus is a:


56. If someone gives you a plant and tells you that it is an angiosperm, you knowthat during its life cycle it will produce


57. From which of the following structures is the secondary oocyte ovulated?


58. Which one is Parthenogenic Fruit?


59. In spermatophytes, important step in land adaptation is the evolution of


60. In gymnosperms male gametophyte consists of


61. Diploid parthenogenesis may occur in;


62. The pollen grain consists of


63. Vehicle for transport of male gamete in land plants is:


64. Phytochrome comprises a pigment and a


65. Between the seminiferous tubules are interstitial calls, which secrete


66. Cucumber, tomato, garden pea, maize, cotton is examples of


67. In seed plants, sperm travel down through what to reach the egg? 


68. In gymnosperms the main plant is diploid and


69. A protective sheath surrounding the radicle is


70. Ovulation is induced by:


71. In gymnosperms female gametophyte consists of


72. External male genitalia are


73. One of the following is not a method of asexual reproduction


74. What is required? 


75. Hypogeal germination takes place due to rapid growth of


76. The hormone florigen is produced in


77. Spermatogenesis and oogenesis both involve


78. The mass of dividing undifferentiated cells of the cut end of the shoot iscalled


79. Corpus luteum starts secreting a hormone known as:


80. If staminate and carpellate flowers are present on same plant it is termed as


81. Which of the following cell type is haploid? 


82. Artificial methods of asexual reproduction in plants is/are


83. Phytochrome exists in two forms i.e., P660 and


84. Parthenocarpy is sometimes artificially induced in tomato, peppers etc by adding


85. Rapid aging and low resistance to environmental stress and diseases are limitations of


86. Which of the following disadvantages applies to tissue culture? 


87. In which type of inflorescence flowers develop into aeropetal succession. 


88. A protective sheath surrounding the plumule is


89. Asexual reproduction does not introduce


90. Perennating organs are associated with which type of asexual reproduction? 


91. A type of syngamy in which both fusing gametes are flagellated but differentin size are known as


92. A form of asexual reproduction in which new individual grows out as a smallout growth and eventually separates from parent body is called


93. Atype sf asexusl reproducion in which parent organism simply divides into two daughter organisms is:


94. Promotion of flowering by cold treatment given to imbibed seeds or youngplants is known as


95. The technique of producing a genetically identical copy of an organism byreplacing the nucleus of an unfertilized ovum with the nucleus of a body cellfrom the organism is


96. What is advantage of sexual reproduction? 


97. Each of the following is a part of a seed except the


98. A carpel is a leaf which has been modified to produce


99. In human female only one ovum is usually discharged from the ovary at onetime and it is called


100. Fertilization is the process which leads to the union of


101. The unisexual flowers are called


102. In planst, spores are formed by 1, whereas gametes are formed by 2


103. The process in which fruit develops without fertilization is called


104. In gymnosperms and angiosperms, the egg is produced in a female structurecalled


105. A flagellated motile sperm fertilizing a non-motile egg, is called


106. A single mushroom may produce how many spores per minute at the peak ofits reproduction? 


107. Sperms are formed in:


108. Single large shield shaped cotyledon of monocot seed is called


109. Sexual reproduction is important to avoid


110. The sepals and petals are


111. In angiosperms what gives rise to seed after fertilization. 


112. Three sets of glands secrete fluids which combine with the sperm to form


113. Which of the following statements is true of clones? 


114. Vegetative propagation does not involve


115. During delivery of baby, average loss of maternal blood is:


116. Which type of inflorescence is shown in the following diagram?


117. Which one of the following is the male reproductive part of a flower? 


118. What event occurs in the menstrual cycle when the level of progesteronedeclines?


119. Tissue culture is a technique used to produce a large number of plantsquickly which are all


120. Human testes are packed with about how many seminiferous tubules whichproduce about how many million sperms every day? 


121. Uterus opens into the vestibule through:


122. Where does the uterus opens into the through cervix? 


123. The follicle cells, after release of the egg, are modified to form a specialstructure called


124. It is defined as a cluster of flowers, arising from the main stem axis orpeduncle


125. In terrestrial conditions which type fertilization is more common


126. Date palms are


127. What is/are basis for asexual reproduction? 


128. Asexual reproduction differs from sexual reproduction in that it does not require


129. Decrease of FSH and increase of estrogen causes the pituitary gland to secrete


Short Questions

1. Classify the plants according to photoperiodic requirement for flowering. Name types of plants according to photoperiodism.
2. Compare sexual and asexual reproduction.
3. Define apomixes. What is meant by apomixes? What is apomixes
4. Define apomixis.
5. Define climatric?
6. Define diplohaplontic life cycle.
7. Define fertilization?
8. Define Parthenogenesis?
9. Define photoperiodism and write its effects in plants. Give importance of photoperiodism in plants.
10. Define photoperiodism?
11. Define reproduction.What is its significance?
12. Define vernalization. What is vernalization?
13. Describe diplontic life cycle.
14. Developing seeds are rich sources of which growth substances (or hormones)?
15. Differentiate between asexual and sexual reproductions?
16. Differentiate between haploid parthenogenesis and diploid parthenogenesis. Define diploid parthenogenesis. Define diploid parthenogenesis.Give an example.
17. Differentiate between identical twins and fraternal twins. How identical twins and fraternal twins are produced?
18. Differentiate between internal and external fertilization.
19. Differentiate between isomorphic and heteromorphic?
20. Differentiate between menupause and ovulation. Explain menupause and after birth.
21. Differentiate between P 660 and P 730?
22. Differentiate between spermatogenesis and oogenesis.
23. Explain haplontic life cycle.
24. Give examples of some animals in which external fertilization occurs?
25. Give some advantages of cloning?
26. Give some disadvantages of cloning?
27. Give three examples, each of short-day plats and long-day plants.
28. How can you differentiate between menstrual cycle and oestrous cycle? Define/ Explain oestrous cycle.
29. How does reproduction differ from all other function of animals?
30. How is a zygote formed?
31. How lactation differ from gestation?
32. How many types of reproduction are there?
33. How test tube babies are produced? What are test tube babies
34. In which ways does light influence plants?
35. Quote examples of animals which develop by parthenogenesis?
36. What are day neutral plants?
37. What are different methods of asexual reproduction?
38. What are drones?
39. What are epididymis and vas deferns?
40. What are functions of the growth substances present in the developing fruits?
41. What are identical twins?
42. What are long-day plants?
43. What are Oviparous, Viviparous and Ovoviviparous animals?
44. What are phytochromes?
45. What are seminiferous tubules?
46. What are sertoli cells?
47. What are short-day plants?
48. What are spermatocytes and spermatids?
49. What are the kinds of “alternation of generations” in plants?
50. What are the various methods of asexual reproduction in plants?
51. What are the various ways of asexual reproduction in animals?
52. What are viviparous?
53. What common methods of asexual reproduction in animals?
54. What do you mean by Hermaphrodites?
55. What hormone induces vernalisation?
56. What is a hermaphrodite animal? Quote examples?
57. What is after birth?
58. What is asexual reproduction?
59. What is climatric and what is its importance?
60. What is Cloning?
61. What is Diplohaplontic life cycle?
62. What is diploid parthenogenesis?
63. What is external genitalia in human male?
64. What is fertilization?
65. What is florigen?
66. What is follicle atresia?
67. What is fruit set?
68. What is haploid parthenogensis?
69. What is importance of vernalization in agriculture?
70. What is menstrual cycle?
71. What is ovoviviparous condition?
72. What is ovulation?
73. What is parthenocarpy?
74. What is parthenocarpy? How do parthenocarpic fruits differ from normal fruits? Quote examples of such fruits?
75. What is photomorphogenesis?
76. What is phytochrome in plant cells? What are its interconvertible forms?
77. What is reproduction?
78. What is seed dormancy? Give its importance.
79. What is sexual reproduction?
80. What is Testosterone?
81. What is the critical day length period in a long day plant, henbane?
82. What is the critical day length period in a short-day plant, cocklebur?
83. What is the duration of low temperature for vernalistion?
84. What is the function of germinating pollen grain?
85. What is the importance of photoperiodism and veralization?
86. What is the parthenocarpy due to in plants?
87. What is the role of interstitial cells in sperm production?
88. What is the role of phytochromic in flowering in long-day and in short-day plants?
89. What is the role of placenta in human?
90. What is the structure and function of corpus luteum?
91. What is Tissue culturing technique?
92. Which are fraternal twins or triplets?
93. Which method of reproduction is primitive asexual sexual?
94. Who studied photoperiodism for the first time and when?
95. Why Garner and Allard are famous for?
96. Write down at least two important measures to prevent AIDS.

Long Questions

1. Compare asexual reproduction with sexual reproduction. Give a comprehensive comparison between asexual and sexual reproduction.
2. Define vernalization? Discuss its importance in plants.
3. Describe human male reproductive cycle.
4. Describe sexually transmitted diseases in human being.
5. Describe the photoperiodism and classify the plants according to photoperiodic requirements for flowering.
6. Describe the reproductive system of human female. Describe human female reproductive system.
7. Describe the reproductive system of male.
8. Discuss human female reproductive system.
9. Discuss the process of birth in human female.
10. Explain reproductive or menstrual cycle of human female. Describe the steps of menstrual cycle in human female.
11. Explain the process of birth in human beings. Describe the birth in man.
12. Explain the role of phytochrome in photoperiodism. Define and explain photoperiodism.
13. Explain the role of phytochromes in photoperiodism.
14. Give a comprehensive comparison between sexual and asexual reproduction.
15. Give an account of Sexually Transmitted Diseases in man. Explain Sexually Transmitted Diseases with the help of examples. Explain Sexually Transmitted Diseases in humans.
16. What are main functions of placenta during pregnancy?
17. What is cloning? Give its advantage and disadvantages.
18. Write a note on test tube babies.
19. Write a note on test tube baby and identical twins.
20. Write brief Note on Photoperiodism.

Leave a Reply

Your email address will not be published. Required fields are marked *