📘 Chapter 7: How Do Organisms Reproduce? – Class 10 Science
Looking for easy and effective ways to revise Chapter 8 of Class 10 Science? You’re in the right place! Here, we’ve compiled over 100 multiple choice questions (MCQs) based on the latest CBSE syllabus. These questions cover everything from asexual reproduction to human reproductive systems, and include answers in a neat, click-to-reveal format.
Whether you’re preparing for boards, classroom tests, or just brushing up your biology concepts, these MCQs will make learning fun and engaging. Let’s dive in! 🌱
1. 🌱 Which method of reproduction is common in unicellular organisms?
- A. Budding
- B. Binary fission
- C. Fragmentation
- D. Spore formation
🔍 Show Answer
✅ B. Binary fission
2. 🧬 What is the function of testes in human males?
- A. Production of ova
- B. Production of estrogen
- C. Production of sperm and testosterone
- D. Fertilization of egg
🔍 Show Answer
✅ C. Production of sperm and testosterone
3. 🌿 Which structure in plants helps in vegetative propagation?
- A. Roots
- B. Flowers
- C. Seeds
- D. Stem tubers
🔍 Show Answer
✅ D. Stem tubers
4. 🤰 In which female organ does fertilization usually take place?
- A. Ovary
- B. Vagina
- C. Fallopian tube
- D. Uterus
🔍 Show Answer
✅ C. Fallopian tube
5. 🪸 Which of the following is a form of asexual reproduction in Hydra?
- A. Binary fission
- B. Budding
- C. Fragmentation
- D. Spore formation
🔍 Show Answer
✅ B. Budding
6. 🩺 Which hormone triggers the release of an egg during ovulation?
- A. Estrogen
- B. FSH
- C. LH
- D. Progesterone
🔍 Show Answer
✅ C. LH
7. 🍄 Which organism reproduces by spore formation?
- A. Yeast
- B. Amoeba
- C. Rhizopus
- D. Planaria
🔍 Show Answer
✅ C. Rhizopus
8. 🚫 Which of the following is not a sexually transmitted disease?
- A. Gonorrhea
- B. Hepatitis B
- C. Syphilis
- D. Typhoid
🔍 Show Answer
✅ D. Typhoid
9. 🛡️ Which contraceptive method prevents sperm reaching the uterus?
- A. Oral pills
- B. Copper-T
- C. Condom
- D. IUD
🔍 Show Answer
✅ C. Condom
10. 👫 What is the chromosomal composition of a human male?
- A. XX
- B. XY
- C. XO
- D. YY
🔍 Show Answer
✅ B. XY
11. 🌾 Which plant part is used in artificial vegetative propagation?
- A. Leaf
- B. Stem cutting
- C. Flower
- D. Seed
🔍 Show Answer
✅ B. Stem cutting
12. 🧫 Which microbe reproduces by binary fission?
- A. Paramecium
- B. Amoeba
- C. Bacteria
- D. Fungi
🔍 Show Answer
✅ C. Bacteria
13. 🍄 In fungi, spores are produced in structures called:
- A. Conidia
- B. Sporangia
- C. Buds
- D. Zygotes
🔍 Show Answer
✅ B. Sporangia
14. 🥚 What type of reproduction involves gamete fusion?
- A. Asexual
- B. Sexual
- C. Budding
- D. Regeneration
🔍 Show Answer
✅ B. Sexual
15. 🌱 Which hormone promotes fruit drop?
- A. Auxin
- B. Ethylene
- C. Cytokinin
- D. Gibberellin
🔍 Show Answer
✅ B. Ethylene
16. 🚼 Which process ensures genetic variation?
- A. Binary fission
- B. Budding
- C. Fertilization
- D. Spore formation
🔍 Show Answer
✅ C. Fertilization
17. 🦠 Yeast reproduces by:
- A. Binary fission
- B. Budding
- C. Fragmentation
- D. Spore formation
🔍 Show Answer
✅ B. Budding
18. 🎋 Which vegetative propagation uses leaf buds?
- A. Grafting
- B. Layering
- C. Leaf cutting
- D. Tissue culture
🔍 Show Answer
✅ C. Leaf cutting
19. 🤱 The placenta facilitates:
- A. Waste removal
- B. Nutrient exchange
- C. Gas exchange
- D. All of the above
🔍 Show Answer
✅ D. All of the above
20. 🧬 Which term describes development of a new individual from a part?
- A. Regeneration
- B. Fragmentation
- C. Budding
- D. Sporulation
🔍 Show Answer
✅ B. Fragmentation
21. 👶 Which structure produces milk in mammals?
- A. Urethra
- B. Mammary glands
- C. Ovary
- D. Pituitary
🔍 Show Answer
✅ B. Mammary glands
22. 🏵️ Which flower part develops into fruit?
- A. Ovary
- B. Petal
- C. Stamen
- D. Sepal
🔍 Show Answer
✅ A. Ovary
23. 🩸 The fluid in which sperm swim is:
- A. Blood
- B. Semen
- C. Plasma
- D. Lymph
🔍 Show Answer
✅ B. Semen
24. 🌸 Which process forms seeds without fertilization?
- A. Parthenogenesis
- B. Pollination
- C. Double fertilization
- D. Budding
🔍 Show Answer
✅ A. Parthenogenesis
25. 🌐 IVF stands for:
- A. In vivo fertilization
- B. In vitro fertilization
- C. Internal vesicle formation
- D. Instant variation factor
🔍 Show Answer
✅ B. In vitro fertilization
26. 🧫 Which cell division leads to gamete formation?
- A. Mitosis
- B. Meiosis
- C. Binary fission
- D. Budding
🔍 Show Answer
✅ B. Meiosis
27. 🦠 Which method of reproduction is seen in Spirogyra?
- A. Conjugation
- B. Budding
- C. Binary fission
- D. Spore formation
🔍 Show Answer
✅ A. Conjugation
28. 🛡️ Which barrier prevents sperm entry into the uterus?
- A. Condom
- B. Diaphragm (contraceptive)
- C. IUD
- D. All of the above
🔍 Show Answer
✅ D. All of the above
29. 🌡️ Which hormone maintains pregnancy?
- A. Estrogen
- B. Progesterone
- C. LH
- D. FSH
🔍 Show Answer
✅ B. Progesterone
30. 🌱 Which technique produces disease-free plants?
- A. Layering
- B. Grafting
- C. Tissue culture
- D. Cutting
🔍 Show Answer
✅ C. Tissue culture
31. 🗂️ Which technique is used to clone plants in labs?
- A. Grafting
- B. Layering
- C. Tissue culture
- D. Cutting
🔍 Show Answer
✅ C. Tissue culture
32. 🧬 What is the ploidy of gametes in humans?
- A. Diploid
- B. Haploid
- C. Polyploid
- D. Triploid
🔍 Show Answer
✅ B. Haploid
33. 🌿 Which part of Bryophyllum leaf gives rise to new plantlets?
- A. Margin
- B. Midrib
- C. Veins
- D. Petiole
🔍 Show Answer
✅ A. Margin
34. 🦠 Which protozoan reproduces by multiple fission?
- A. Paramecium
- B. Amoeba
- C. Plasmodium
- D. Euglena
🔍 Show Answer
✅ C. Plasmodium
35. ⚙️ What process produces haploid spores in plants?
- A. Mitosis
- B. Meiosis
- C. Fragmentation
- D. Budding
🔍 Show Answer
✅ B. Meiosis
36. 🤰 Which organ produces progesterone?
- A. Testes
- B. Ovary
- C. Adrenal gland
- D. Pituitary
🔍 Show Answer
✅ B. Ovary
37. 🌸 Which cell division increases chromosome number?
- A. Mitosis
- B. Meiosis I
- C. Meiosis II
- D. None
🔍 Show Answer
✅ D. None
38. 🧪 Which structure stores pollen grains?
- A. Ovule
- B. Anther
- C. Stigma
- D. Style
🔍 Show Answer
✅ B. Anther
39. 🔁 What ensures alternation of generations in plants?
- A. Spore germination
- B. Seed formation
- C. Gamete fusion
- D. Both A and C
🔍 Show Answer
✅ D. Both A and C
40. 🌿 Which vegetative method uses underground stems?
- A. Corms
- B. Rhizomes
- C. Runners
- D. Bulbs
🔍 Show Answer
✅ B. Rhizomes
41. 🏥 Which disease can be prevented by vaccination of HPV?
- A. AIDS
- B. Cervical cancer
- C. Malaria
- D. Yellow fever
🔍 Show Answer
✅ B. Cervical cancer
42. 🌡️ What is the viability period of a human ovum?
- A. 1 day
- B. 3 days
- C. 7 days
- D. 14 days
🔍 Show Answer
✅ A. 1 day
43. 🧫 Which method is used for rapid mass propagation of elite plants?
- A. Grafting
- B. Tissue culture
- C. Cutting
- D. Layering
🔍 Show Answer
✅ B. Tissue culture
44. 🥚 Which substance nourishes the embryo in mammals?
- A. Amniotic fluid
- B. Placenta
- C. Yolk sac
- D. Uterine lining
🔍 Show Answer
✅ B. Placenta
45. ⚖️ Which hormone regulates blood sugar?
- A. Glucagon
- B. Insulin
- C. Adrenaline
- D. Cortisol
🔍 Show Answer
✅ B. Insulin
46. 🌿 Which part of mango plant is used for grafting?
- A. Seed
- B. Scion & Rootstock
- C. Leaf
- D. Flower
🔍 Show Answer
✅ B. Scion & Rootstock
47. 🛡️ Which contraceptive releases hormones?
- A. Condom
- B. Copper IUD
- C. Oral pill
- D. Diaphragm
🔍 Show Answer
✅ C. Oral pill
48. 🌱 Which hormone promotes root growth?
- A. Auxin
- B. Gibberellin
- C. Cytokinin
- D. Abscisic acid
🔍 Show Answer
✅ A. Auxin
49. 🦠 Which STD is caused by bacteria?
- A. HIV/AIDS
- B. Gonorrhea
- C. Herpes
- D. Hepatitis
🔍 Show Answer
✅ B. Gonorrhea
50. 👨👩👧👦 Which reproductive method combines traits of both parents?
- A. Budding
- B. Asexual fission
- C. Sexual reproduction
- D. Spore formation
🔍 Show Answer
✅ C. Sexual reproduction
51. 🧬 What is the role of the epididymis in males?
- A. Produce sperm
- B. Store and mature sperm
- C. Secrete testosterone
- D. Transport ova
🔍 Show Answer
✅ B. Store and mature sperm
52. 🌱 Which plant hormone is responsible for leaf fall?
- A. Auxin
- B. Ethylene
- C. Abscisic acid
- D. Cytokinin
🔍 Show Answer
✅ C. Abscisic acid
53. 🦠 Which protozoan reproduces by multiple fission?
- A. Amoeba
- B. Plasmodium
- C. Paramecium
- D. Euglena
🔍 Show Answer
✅ B. Plasmodium
54. ⚖️ In human males, testosterone is produced by?
- A. Seminiferous tubules
- B. Leydig cells
- C. Sertoli cells
- D. Spermatogonia
🔍 Show Answer
✅ B. Leydig cells
55. 🌿 Which part of a cactus helps in vegetative propagation?
- A. Root
- B. Leaf
- C. Stem segment
- D. Flower
🔍 Show Answer
✅ C. Stem segment
56. 🔬 Which technique allows rapid disease-free plant multiplication?
- A. Grafting
- B. Layering
- C. Tissue culture
- D. Budding
🔍 Show Answer
✅ C. Tissue culture
57. 🚼 Which structure carries ovum from ovary to uterus?
- A. Urethra
- B. Oviduct
- C. Ureter
- D. Fallopian tube
🔍 Show Answer
✅ B. Fallopian tube
58. 🧪 Which hormone is secreted by corpus luteum?
- A. Estrogen
- B. Progesterone
- C. LH
- D. FSH
🔍 Show Answer
✅ B. Progesterone
59. 🌸 What is anthesis in flowering plants?
- A. Fruit formation
- B. Flower withering
- C. Anther dehiscence
- D. Petal unfurling
🔍 Show Answer
✅ C. Anther dehiscence
60. ⚙️ Which process involves fusion of male and female gametes?
- A. Pollination
- B. Fertilization
- C. Germination
- D. Double fertilization
🔍 Show Answer
✅ B. Fertilization
61. 🧬 What term describes organisms producing both male and female gametes?
- A. Dioecious
- B. Monoecious
- C. Hermaphrodite
- D. Parthenogenetic
🔍 Show Answer
✅ C. Hermaphrodite
62. 🥚 Which structure encloses embryo in seed?
- A. Endosperm
- B. Seed coat
- C. Cotyledon
- D. Testa
🔍 Show Answer
✅ B. Seed coat
63. 👶 Which process describes birth of live young?
- A. Oviparous
- B. Viviparous
- C. Ovoviviparous
- D. Asexual
🔍 Show Answer
✅ B. Viviparous
64. 🌿 Which vegetative method uses leaf buds?
- A. Grafting
- B. Budding
- C. Layering
- D. Leaf cutting
🔍 Show Answer
✅ D. Leaf cutting
65. 🦠 Which entity reproduces by sporulation?
- A. Yeast
- B. Mucor
- C. Amoeba
- D. Hydra
🔍 Show Answer
✅ B. Mucor
66. 🌸 Which part of pistil receives pollen?
- A. Ovary
- B. Style
- C. Stigma
- D. Anther
🔍 Show Answer
✅ C. Stigma
67. ⚗️ Which technique is used for embryo transfer in cattle?
- A. Budding
- B. IVF
- C. Embryo transplant
- D. Cloning
🔍 Show Answer
✅ C. Embryo transplant
68. 🔁 Which reproductive strategy aids survival in harsh conditions?
- A. Sexual reproduction
- B. Asexual reproduction
- C. Spore formation
- D. Both B and C
🔍 Show Answer
✅ C. Spore formation
69. 🧠 Which part of the brain regulates reproductive hormones?
- A. Medulla
- B. Hypothalamus
- C. Cerebellum
- D. Cerebrum
🔍 Show Answer
✅ B. Hypothalamus
70. 🌎 Which reproductive method allows adaptation to environment?
- A. Asexual reproduction
- B. Sexual reproduction
- C. Vegetative propagation
- D. Spore formation
🔍 Show Answer
✅ B. Sexual reproduction
71. 🩺 Which hormone stimulates milk production?
- A. Oxytocin
- B. Prolactin
- C. Estrogen
- D. Progesterone
🔍 Show Answer
✅ B. Prolactin
72. 🌱 Which vegetative propagation involves cutting and replanting?
- A. Layering
- B. Grafting
- C. Cutting
- D. Budding
🔍 Show Answer
✅ C. Cutting
73. 🦠 Which bacterium reproduces rapidly in binary fission?
- A. E. coli
- B. Streptococcus
- C. Lactobacillus
- D. Staphylococcus
🔍 Show Answer
✅ A. E. coli
74. 🥚 Which cells produce ova in human females?
- A. Spermatogonia
- B. Follicle cells
- C. Oogonia
- D. Leydig cells
🔍 Show Answer
✅ C. Oogonia
75. 🌿 Which propagation method uses underground stems?
- A. Runners
- B. Rhizomes
- C. Stolons
- D. Corms
🔍 Show Answer
✅ B. Rhizomes
76. 🌸 Which part becomes the seed in flowering plants?
- A. Ovule
- B. Anther
- C. Stigma
- D. Style
🔍 Show Answer
✅ A. Ovule
77. 🧬 During meiosis, crossing over increases:
- A. Chromosome number
- B. Genetic variation
- C. Cell size
- D. Gamete size
🔍 Show Answer
✅ B. Genetic variation
78. 🚼 Which structure forms the embryo sac?
- A. Megaspore
- B. Microspore
- C. Zygote
- D. Endosperm
🔍 Show Answer
✅ A. Megaspore
79. 🥼 Which lab technique separates chromosomes for karyotyping?
- A. Gel electrophoresis
- B. Centrifugation
- C. Microscopy
- D. Staining
🔍 Show Answer
✅ A. Gel electrophoresis
80. 🏥 Which organ stores sperms until ejaculation?
- A. Seminal vesicle
- B. Prostate gland
- C. Epididymis
- D. Vas deferens
🔍 Show Answer
✅ C. Epididymis
81. 🌡️ Which hormone initiates labor in humans?
- A. Oxytocin
- B. Progesterone
- C. Estrogen
- D. HCG
🔍 Show Answer
✅ A. Oxytocin
82. 🔁 Which process is identical in all asexual reproduction?
- A. Fertilization
- B. Budding
- C. Cell division
- D. Meiosis
🔍 Show Answer
✅ C. Cell division
83. 🌿 What is meant by parthenocarpy?
- A. Fruit without seed
- B. Seed without fruit
- C. Fruit with embryo
- D. Seedless germination
🔍 Show Answer
✅ A. Fruit without seed
84. 🧫 Which reproductive disorder is characterized by absence of menstruation?
- A. Menorrhagia
- B. Amenorrhea
- C. Dysmenorrhea
- D. Oligomenorrhea
🔍 Show Answer
✅ B. Amenorrhea
85. 🛡️ Which vaccination helps prevent cervical cancer?
- A. Hepatitis B
- B. HPV
- C. MMR
- D. Polio
🔍 Show Answer
✅ B. HPV
86. 🌱 Which method uses bulb scales for propagation?
- A. Corms
- B. Bulbils
- C. Scaling
- D. Leaf cutting
🔍 Show Answer
✅ C. Scaling
87. 🧠 Which gland regulates sleep–wake cycle?
- A. Pituitary
- B. Pineal
- C. Thymus
- D. Thyroid
🔍 Show Answer
✅ B. Pineal
88. ⚗️ Which lab technique clones animals?
- A. Embryo transfer
- B. Somatic cell nuclear transfer
- C. Artificial insemination
- D. IVF
🔍 Show Answer
✅ B. Somatic cell nuclear transfer
89. 🌡️ Which hormone maintains uterine lining?
- A. Estrogen
- B. Progesterone
- C. LH
- D. FSH
🔍 Show Answer
✅ B. Progesterone
90. 🥚 Which organelle is key in gamete formation?
- A. Mitochondria
- B. Nucleus
- C. Ribosome
- D. Golgi apparatus
🔍 Show Answer
✅ B. Nucleus
91. 🌿 Which hormone delays leaf senescence?
- A. Cytokinin
- B. Auxin
- C. Ethylene
- D. Abscisic acid
🔍 Show Answer
✅ A. Cytokinin
92. 🧫 Which STD is viral?
- A. Gonorrhea
- B. Syphilis
- C. HIV/AIDS
- D. Chlamydia
🔍 Show Answer
✅ C. HIV/AIDS
93. 🏥 Which organ produces seminal fluid?
- A. Prostate gland
- B. Seminal vesicle
- C. Cowper’s gland
- D. Epididymis
🔍 Show Answer
✅ B. Seminal vesicle
94. 🌸 Which part of pistil widens to receive pollen?
- A. Stigma
- B. Style
- C. Ovary
- D. Anther
🔍 Show Answer
✅ A. Stigma
95. 🧠 Which gland links nervous to endocrine?
- A. Pituitary
- B. Thyroid
- C. Hypothalamus
- D. Adrenal
🔍 Show Answer
✅ C. Hypothalamus
96. 🌱 Which plant shows apomixis?
- A. Mango
- B. Citrus
- C. Banana
- D. Rose
🔍 Show Answer
✅ B. Citrus
97. 🧴 Which contraceptive is hormone-based long-term?
- A. Condom
- B. Implant
- C. Diaphragm
- D. IUD
🔍 Show Answer
✅ B. Implant
98. 🔬 What structure protects sperm DNA?
- A. Acrosome
- B. Head
- C. Tail
- D. Midpiece
🔍 Show Answer
✅ A. Acrosome
99. 🩸 What fluid carries sperm?
- A. Semen
- B. Saliva
- C. Plasma
- D. Urine
🔍 Show Answer
✅ A. Semen
100. 🌐 Which IVF step fertilizes egg outside body?
- A. Ovulation induction
- B. Egg retrieval
- C. In vitro fertilization
- D. Embryo transfer
🔍 Show Answer
✅ C. In vitro fertilization
❓ Frequently Asked Questions
🌱 What’s the main difference between sexual and asexual reproduction?
Sexual reproduction requires fusion of gametes and leads to genetic variation, while asexual reproduction involves a single parent and produces genetically identical offspring.
🧫 How does binary fission occur in bacteria?
The bacterial cell duplicates its DNA and divides into two equal halves, each containing a copy of the original genome.
🌿 What is vegetative propagation in plants?
Vegetative propagation is a form of asexual reproduction where new plants grow from stems, roots, or leaves (e.g., stem cuttings, tubers, runners).
🤰 Where does fertilization occur in humans?
Fertilization typically takes place in the fallopian tube, where the sperm meets and fuses with the ovum.
🍄 How are spores different from seeds?
Spores are unicellular reproductive units produced by fungi and some plants, while seeds are multicellular structures containing an embryo, endosperm, and seed coat.
🍼 What role does the placenta play during pregnancy?
The placenta facilitates nutrient and gas exchange between mother and fetus, and produces hormones like progesterone to maintain pregnancy.