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Class 10 Science MCQs Chapter 8 How do Organisms Reproduce?
1. During favourable conditions, Amoeba reproduces by
(a) multiple fission
(b) binary fission
(c) budding
(d) fragmentation
Answer
Answer: b
2. A feature of reproduction that is common to Amoeba, Yeast and Spirogyra is that
(a) they reproduce asexually
(b) they are all unicellular
(c) they reproduce only sexually
(d) they are all multicellular
Answer
Answer: a
3. The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) multiple fission
(c) binary fission
(d) reduction division
Answer
Answer: b
4. Bryophyllum can be propagated vegetatively by the
(a) stem
(b) leaf
(c) root
(d) flower
Answer
Answer: b
5. Vegetative propagation refers to formation of new plants from
(a) stem, flowers and fruits
(b) stem, leaves and flowers
(c) stem, roots and flowers
(d) stem, roots and leaves
Answer
Answer: d
6. In a potato, vegetative propagation takes place by:
(a) root
(b) leaf
(c) stem tuber
(d) grafting
Answer
Answer: c
7. Vegetatively propagated plants
(a) do not bear roots
(b) do not bear buds
(c) are genetically similar
(d) are genetically dissimilar
Answer
Answer: c
8. Spirogyra reproduce by
(a) budding
(b) fragmentation
(c) regeneration
(d) fission
Answer
Answer: b
9. In Rhizopus, tubular thread like structures bearing sporangia at their tips are called
(a) filaments
(b) hyphae
(c) rhizoids
(d) roots
Answer
Answer: b
10. Plants like banana, rose, jasmine, orange have lost the capacity to produce
(a) seeds
(b) buds
(c) flower
(d) roots
Answer
Answer: a
11. The flower of the Hibiscus plant is
(a) bisexual
(b) unisexual
(c) neuter
(d) very small
Answer
Answer: a
12. The part of the flower which is present in the centre of the flower is
(a) Sepals
(b) Petals
(c) Carpels
(d) Stamens
Answer
Answer: c
13. The seed that contains the future plant is called the
(a) cotyledons
(b) seed coat
(c) germ cells
(d) embryo
Answer
Answer: d
14. The period of pregnancy is called
(a) gestation period
(b) incubation period
(c) ovulation
(d) menstruation period
Answer
Answer: a
15. The process of release of eggs from the ovary is called
(a) menstruation
(b) reproduction
(c) insemination
(d) ovulation
Answer
Answer: d
16. The period during adolescence when the reproductive tissues begin to mature is called
(a) ovyfetion
(b) puberty
(c) germination
(d) propagation
Answer
Answer: b
17. In human beings, the fertilization occurs in the
(a) uterus
(b) ovaries
(c) fallopian tubes
(d) vagina
Answer
Answer: c
18. Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms?
(a) Prostate glands
(b) Seminal vesicles
(c) Scrotum
(d) Urinary bladder
Answer
Answer: b
19. The embryo in humans gets nutrition from the mother’s blood with the help of a special tissue called
(a) Placenta
(b) Villi
(c) Uterus
(d) Womb
Answer
Answer: a
20. Which among the following diseases is not sexually transmitted?
(a) Syphyllis
(b) Hepatitis
(c) HIV-AIDS
(d) Gonorrhea
Answer
Answer: b
21. Which of the following method of contraception protects from acquiring sexually trans¬mitted diseases?
(a) Surgery
(b) Condoms
(c) Copper-T
(d) Oral-pills
Answer
Answer: b
22. In human males, the testes lie in the scrotum, because it helps in the
(a) process of mating
(b) formation of sperms
(c) easy transfer of gametes
(d) secretion of estrogen
Answer
Answer: b
23. There is a greater possibility for the evolution of a new species in organisms which reproduce by
(a) binary fission
(b) budding
(c) fertilisation
(d) regeneration
Answer
Answer: c
24. Which is the most common method of reproduction in majority of fungi and bacteria?
(a) Budding
(b) Spore formation
(c) Binary fission
(d) Multiple fission
Answer
Answer: b
25. Which of the following is not an artificial method of vegetative propagation?
(a) Cutting
(b) Layering
(c) Budding
(d) Grafting
Answer
Answer: c
26. Many unicellular organisms reproduce by the process of
(a) fission
(b) ovulation
(c) regeneration
(d) non-disjunction
Answer
Answer: a
27. The ability of an organism to develop whole body from a broken piece or fragment is called
(a) binary fission
(b) budding
(c) multiple fission
(d) regeneration
Answer
Answer: d
28. Pollen grains are produced by
(a) ovary
(b) ovule
(c) apther
(d) corolla
Answer
Answer: c
29. The fertilisation of human egg by the sperm takes place in
(a) vagina
(b) uterus
(c) ovary
(d) oviduct
Answer
Answer: d
30. Which of the following is a primary sex organ in a mammal?
(a) Ovary
(b) Vagina
(c) Uterus
(d) Mammaiy glands
Answer
Answer: a
31. The ability to reproduce is lost in a female after
(a) fertilisation
(b) menstruation
(c) gamete formation
(d) menopause
Answer
Answer: d
32. When a sperm is deposited into the vagina which route does it travel?
(a) Vagina → Oviduct → Uterus → Cervix
(b) Vagina → Ovary → Uterus → Oviduct
(c) Vagina → Cervix → Uterus → Oviduct
(d) Vagina → Uterus → Cervix → Oviduct
Answer
Answer: c
33. In case the ova does not fertilise, which of the following events will take place?
(a) Menstruation
(b) Pregnancy
(c) Implantation
(d) Ovulation
Answer
Answer: a
34. When the foetus is growing inside the uterus it needs nutrients. Which part provides these nutrients?
(a) Placenta
(b) Amniotic sac
(c) Oviduct
(d) Uterus
Answer
Answer: a
35. What marks the beginning of the reproductive life of a woman?
(a) Menopause
(b) Menarche
(c) Fertilisation
(d) Ovulation
Answer
Answer: b
36. Where does fertilisation take place?
(a) Uterus
(b) Vagina
(c) Fallopian tube
(d) Cervix
Answer
Answer: c
37. A pair of duct arising from testis, which carry sperms are
(a) fallopian tube
(b) vas deferens
(c) oviduct
(d) urethra
Answer
Answer: b
38. In the list of organisms given below, those that reproduce by the asexual method are [NCERT Exemplar Problems]
(i) banana
(ii) dog
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)
Answer
Answer: b
Direction (39 to 43): In the following Questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
(c) Assertion is true but the Reason is false.
(d) The statement of the Assertion is false but the Reason is true.
39. Assertion: Amoeba reproduced by fission
Reason: All unicellular organisms reproduced by asexual method.
Answer/Explanation
Answer: a
Explanation:
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
40. Assertion: In human beings, the female. play a major role in determining the sex of the offspring.
Reason: Women have two X chromosomes.
Answer/Explanation
Answer: d
Explanation:
(d) The statement of the Assertion is false but the Reason is true.
41. Assertion: In male reproductive system, transport of sperm takes place in a fluid which also provide nutrition.
Reason: Protective glands and seminal vesicles secret in the vas deferens.
Answer/Explanation
Answer: a
Explanation:
(a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
42. Assertion: Plants raised by vegetative propagation can bear flower and seed earlier than those produced from seeds.
Reason: Plants which lost capacity to bear viable seeds, can propagate through vegetable propagation.
Answer/Explanation
Answer: b
Explanation:
(b) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
43. Assertion: Ovary releases one egg every month.
Reason: The lining of uterus is always thick and spongy.
Answer/Explanation
Answer: c
Explanation:
(c) Assertion is true but the Reason is false.
44. The gestation period in human beings is about days.
Answer/Explanation
Answer:
Explanation: 280
45. The process of release of an egg from the ovary is called .
Answer/Explanation
Answer:
Explanation: ovulation
46. The development of foetus inside the uterus till birth is called .
Answer/Explanation
Answer:
Explanation: gestation
47. The attachment of the embryo to the uterus is called .
Answer/Explanation
Answer:
Explanation: implantation
48. Sterilisation in males is called .
Answer/Explanation
Answer:
Explanation: vasectomy
49. The ability of a cell to divide into several cells during reproduction in . is called .
Answer/Explanation
Answer:
Explanation: Plasmodium, multiple fission
50. The disease is caused by microorganism known as .
Answer/Explanation
Answer:
Explanation: kala-azar, leishmania
51. The organism like can reproduce by the method of .
Answer/Explanation
Answer:
Explanation: spirogyra, fragmentation
52. In Rhizopus the fine thread like structures spread on the whole surface of slice of bread are called .
Answer/Explanation
Answer:
Explanation: hyphae
53. A tiny animal having tentacles which reproduces by growing buds on the side of its body is .
Answer/Explanation
Answer:
Explanation: hydra
54. The importance of variations in organisms is that it helps the species of various organisms to survive in adverse environment. [True/False]
Answer/Explanation
Answer:
Explanation: True
55. Complex multicellular organisms cannot give rise to new organisms through budding. [True/False]
Answer/Explanation
Answer:
Explanation: True
56. Testes are the primary reproductive organs in man. [True/False]
Answer/Explanation
Answer:
Explanation: True
57. An embryo is formed by the growth and development of an foetus. [True/False]
Answer/Explanation
Answer:
Explanation: False
58. An important feature of barrier method is that it protects a person from STDs. [True/F alse]
Answer/Explanation
Answer:
Explanation: True
59. The killing of the unborn girl child is called female foeticide. [True/False]
Answer/Explanation
Answer:
Explanation: True
60. The surgical procedure carried out in females is called vasectomy. [True/False]
Answer/Explanation
Answer:
Explanation: False
61. Copper-T cannot protect from acquiring sexually transmitted diseases. [True/False]
Answer/Explanation
Answer:
Explanation: True
62. Gonorrhoea and syphilis are caused by bacteria. [True/False]
Answer/Explanation
Answer:
Explanation: True
Direction (63 to 64): Column II. Match column I with
63.
| Column I | Column II |
| (i) Placenta | (A) Binary fission |
| (ii) Male gametes of plant | (B) Bryophylium |
| (iii) Budding | (C) Nourishment of embryo |
| (iv) Amoeba | (D) Yeast |
| (v) Vegetative propagation by leaves | (E) Pollen grains |
Answer/Explanation
Answer:
Explanation:
(i) (C)
(ii) (E)
(iii) (D)
(iv) (A)
(v) (B)
64.
| Column I | Column II |
| (i) Fission | (A) Spirogyra |
| (ii) Fragmentation | (B) Hydra |
| (iii) Regeneration | (C) Bryophyllitm |
| (iv) Budding | (D) Amoeba |
| (E) Planaria |
Answer/Explanation
Answer:
Explanation:
(i) (C)
(ii) (A)
(iii) (D)
(iv) (B)
65. Name the life process of an organism that helps in the growth of its population. [At 2015]
Answer/Explanation
Answer:
Explanation: Reproduction.
66. What are the two types of reproduction?
Answer/Explanation
Answer:
Explanation:
Sexual and asexual reproduction.
67. Which is the most basic event in reproduction?
Answer/Explanation
Answer:
Explanation:
Creation of a DNA copy.
68. Write the full form of DNA.
Answer/Explanation
Answer:
Explanation:
The full form of DNA is deoxyribonucleic acid.
69. What is DNA? [Foreign 2015]
Answer/Explanation
Answer:
Explanation:
The full form of DNA is deoxyribonucleic acid. DNA lies in the cell nucleus which is the information source for making proteins, and different proteins lead to different designs.
70. Where is DNA found in a cell? [DoE; AI 2015]
Answer/Explanation
Answer:
Explanation:
DNA is found in the nucleus.
71. What is DNA copying? [Delhi 2015]
Answer/Explanation
Answer:
Explanation:
DNA in the cell nucleus is the information source for making proteins and different proteins lead to different body designs. Dining reproduction, similar copy of DNA is generated and the process is called DNA copying.
72. What is the effect of DNA copying which is not perfectly accurate on the reproduction process? [HOTS]
Answer/Explanation
Answer:
Explanation:
DNA copying is not perfectly accurate and the resultant errors are a source of variations in populations of organisms.
73. Mention the mode of reproduction used by
(a) Amoeba
(b) Planaria [HOTS]
Answer/Explanation
Answer:
Explanation:
Mode of reproduction used by
(a) Amoeba is binary fission.
(b) Planaria is regeneration.
74. Name two organisms which are reproduced by binary fission.
Answer/Explanation
Answer:
Explanation:
Amoeba and leishmania are reproduced by binary fission.
75. Name the causative agent of the disease “Kala-azar” and its mode of asexual reproduction. [Foreign 2015]
Answer/Explanation
Answer:
Explanation:
Leishmania causes kala-azar. It reproduces by binary fission.
76. Name the method by which spirogyra reproduces under favourable conditions. Is this method sexual or asexual? [Delhi 2017]
Answer/Explanation
Answer:
Explanation:
Spirogyra reproduces by fragmentation.
It is an asexual method of reproduction.
77. Name two simple organisms having the ability of regeneration. [AI 2015]
Answer/Explanation
Answer:
Explanation: Hydra and Planaria.
78. What is the difference between fission and fragmentation?
Answer/Explanation
Answer:
Explanation:
In fission, an unicellular organism breaks up to form two new organisms whereas in case of fragmentation a multicellular organisms breaks up to form two new organisms.
79. Name the method by which Hydra reproduces. Is this method sexual or asexual? [Foreign 2016]
Answer/Explanation
Answer:
Explanation:
Hydra reproduces by budding. It is an asexual method.
80. What happens to a slice of bread kept in a moist dark place?
Answer/Explanation
Answer:
Explanation: Rhizopus fungus will develop.
81. Name the part of Bryophyllum where the buds are produced for vegetative propagation. [Delhi 2016]
Answer/Explanation
Answer:
Explanation:
Vegetative part, leaf is used in the propagation of Bryophyllum.
82. Select two plants raised by the method of vegetative propagation from the list given below:
banana, gram, rose, tomato, wheat, jasmine.
Answer/Explanation
Answer:
Explanation:
Banana, jasmine and rose are raised by vegetative method.
83. State what type of method is used for growing jasmine plant. [DoE; HOTS]
Answer/Explanation
Answer:
Explanation:
Artificial methods of vegetative propagation like layering is used for growing jasmine plant.
84. Do you know which part become a new plant in vegetation propagation?
Answer/Explanation
Answer:
Explanation: Root, stem and leaves.
85. What are those organisms called which bear both the sex organs in the same individual. Give one example of such organism. [AI2016]
Answer/Explanation
Answer:
Explanation:
Organisms which bear both the sex organs are called hermaphrodite/bisexual.
Example: Earthworm
86. What is a bisexual flower? Give one example. [DoE]
Answer/Explanation
Answer:
Explanation:
A bisexual flower is a flower that contains both stamens and carpel. Example: Hibiscus.
87. Name the parts of a bisexual flower that are not directly involved in reproduction. [Foreign 2015]
Answer/Explanation
Answer:
Explanation:
Parts of a bisexual flower which are not directly involved in reproduction are
(i) Petal, (ii) Sepal and (iii) Stem.
88. Write suitable conditions necessary for seed germination. [DoE]
Answer/Explanation
Answer:
Explanation:
Conditions necessary for seed germination are water, temperature and oxygen.
89. Name the floral parts of a plant that develop into (i) Fruit (ii) Seeds. [DoE]
Answer/Explanation
Answer:
Explanation:
(i) Fruit: Ovary
(ii) Seed: Ovule
90. What is carpel?
Answer/Explanation
Answer:
Explanation:
It is the female reproductive organ of the plant.
91. Name the part of female reproductive system where the egg is fertilized. [DoE]
Answer/Explanation
Answer:
Explanation:
Egg gets fertilized in the oviduct.
92. What is the average duration of human pregnancy? [HOTS]
Answer/Explanation
Answer:
Explanation:
The average duration of human pregnancy is 40 weeks or 280 days.
93. Name the largest cell present in the human body. [HOTS]
Answer/Explanation
Answer:
Explanation:
The largest cell present in the human body is ovum.
94. Name the organs producing sperms and ova respectively in humans. [Foreign 2017]
Answer/Explanation
Answer:
Explanation:
Testes produce sperms and ovary produces ova.
95. Name the hormones responsible for secondary sexual characters in
(i) Girls
(ii) Boys. [DoE]
Answer/Explanation
Answer:
Explanation:
(i) Girls: Estrogen and progesterone
(ii) Boys: Testosterone
96. What is Gestation period? [DoE]
Answer/Explanation
Answer:
Explanation:
The time period from the development of the foetus till birth is called gestation period.
97. What are the male and female gonads in human beings ? [HOTS]
Answer/Explanation
Answer:
Explanation:
Male gonads are testis and female gonads are ovaries in human beings.
98. Define Zygote.
Answer/Explanation
Answer:
Explanation:
The cell which is formed by the fusion of a male gamete and a female gamete is called zygote, i.e., it is a ‘fertilised ovum’ or ‘fertilised egg’.
99. What is Puberty?
Answer/Explanation
Answer:
Explanation:
It is the age at which the sex hormones or gametes begin to be produced and the boy or girl becomes sexually mature.
100. What is adolesence?
Answer/Explanation
Answer:
Explanation:
Stage between childhood and adulthood.
101. Name the liqiud which contains sperms.
Answer/Explanation
Answer:
Explanation: Semen.
102. Define implantation with respect to human reproductive system.
Answer/Explanation
Answer:
Explanation:
It is the close attachment of embryo to the utemine wall.
103. Name the parts of the human female reproductive system where implantation of the fertilised egg occurs.
Answer/Explanation
Answer:
Explanation:
Implantation of fertilized egg takes place in the uterus.
104. Which one of the STDs damages the immune system of human body? [HOTS]
Answer/Explanation
Answer:
Explanation:
AIDS damages the immune system of human body.
105. Name the causative organisms for the following diseases:
(a) AIDS
(b) Warts
(c) Gonorrhoea
(d) Syphilis
Answer/Explanation
Answer:
Explanation:
(a) virus
(b) virus
(c) bacteria
(d) bacteria
106. Name the contraceptive device which protects a person from acquiring sexually transmitted diseases.
Answer/Explanation
Answer:
Explanation: Condom.
107. What is the role of seminal vesicles and the prostate gland? [DoE, AI 2011]
Answer/Explanation
Answer:
Explanation:
(i) Seminal vesicles are a pair of thin-walled muscular elongated sac which secrete fluid for nourishment and smooth transport of sperms.
(ii) Prostate gland also produce fluid which is released in the urethra along with the secretion of seminal vesicles to make transportation of sperms easier and also provides nutrition.
Fill in the Blanks
1. The process of reproduction involving only one cell or one parent is called ………….. .
2. ………….. is a duct coming from the urinary bladder which carries sperms.
3. Process of fertilization takes place in the ………….. tube in humans.
4. ………….. is the ability of an organism to replace its lost body parts.
5. ………….. is called the production of new plants from stems, roots or leaves.
6. ………….. is the term used to refer to the commencement of menstruation at puberty.
7. ………….. is the virus that causes AIDS.
Answers
1. Uniparental/ Asexual reproduction
2. Vas deferens
3. fallopian
4. Regeneration
5. Vegetative propagation
6. Menarch
7. HIV-Human Immuno Virus
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