🐣 Reproduction in Animals – MCQs for Class 8 Science

Part 3: Q51–Q75

Q51. Which of these is a male reproductive organ in humans?

A) Ovary
B) Testis
C) Uterus
D) Oviduct

✅ Correct Answer: B) Testis

Explanation:

• A, C, D – Female organs.
• B) ✔ Testes produce sperms and testosterone.

Q52. Which is the female gamete?

A) Sperm
B) Ovum
C) Zygote
D) Embryo

✅ Correct Answer: B) Ovum

Explanation:

• A) Male gamete.
• B) ✔ Ovum (egg) is female gamete.
• C, D – Products of fertilization.

Q53. Which of these is an example of asexual reproduction?

A) Fertilization in frog
B) Budding in yeast
C) Egg laying in hen
D) Internal fertilization in humans

✅ Correct Answer: B) Budding in yeast

Explanation:

• A, C, D – Sexual.
• B) ✔ Yeast reproduces asexually by budding.

Q54. Which is the connecting link between parents and offspring?

A) Chromosomes
B) Genes
C) Gametes
D) Zygote

✅ Correct Answer: C) Gametes

Explanation:

• A, B – Carry traits, but not direct link.
• C) ✔ Gametes unite to form offspring.
• D) Zygote – Formed after gametes fuse.

Q55. In which type of fertilization are more eggs laid to ensure survival?

A) Internal fertilization
B) External fertilization
C) Asexual reproduction
D) Viviparous reproduction

✅ Correct Answer: B) External fertilization

Explanation:

• A, C, D – Fewer eggs, higher success.
• B) ✔ External fertilization → many eggs (e.g., fish, frog).

Q56. Which animal reproduces both sexually and asexually?

A) Frog
B) Amoeba
C) Hydra
D) Dog

✅ Correct Answer: C) Hydra

Explanation:

• A, B, D – Only one method.
• C) ✔ Hydra reproduces asexually by budding and sexually by gametes.

Q57. The placenta helps in:

A) Food and oxygen supply to embryo
B) Sperm production
C) Egg formation
D) Fertilization

✅ Correct Answer: A) Food and oxygen supply to embryo

Explanation:

• A) ✔ Placenta supplies nutrients and oxygen, removes waste.
• B, C, D – Other processes.

Q58. Which structure carries the sperm from testis to outside?

A) Urethra
B) Ovary
C) Uterus
D) Oviduct

✅ Correct Answer: A) Urethra

Explanation:

• A) ✔ Urethra carries sperm and urine out.
• B, C, D – Female organs.

Q59. Which stage comes immediately after zygote formation?

A) Gamete
B) Embryo
C) Foetus
D) Ovum

✅ Correct Answer: B) Embryo

Explanation:

• A, D – Pre-fertilization.
• B) ✔ Zygote divides to form embryo.
• C) Foetus → later stage.

Q60. What is the function of the sperm tail?

A) Penetrate egg
B) Movement
C) DNA storage
D) Energy production

✅ Correct Answer: B) Movement

Explanation:

• A) Egg penetration by head.
• B) ✔ Tail propels sperm.
• C) DNA in head.
• D) Middle piece provides energy.

Q61. The number of chromosomes in human zygote is:

A) 23
B) 46
C) 44
D) 22

✅ Correct Answer: B) 46

Explanation:

• A, D – Haploid gametes.
• B) ✔ Zygote = 23 from sperm + 23 from egg = 46.
• C) Wrong number.

Q62. Which of the following is viviparous?

A) Hen
B) Frog
C) Cow
D) Lizard

✅ Correct Answer: C) Cow

Explanation:

• A, B, D – Egg-laying.
• C) ✔ Cow → young ones born alive.

Q63. In human females, fertilization usually occurs in:

A) Uterus
B) Ovary
C) Oviduct
D) Vagina

✅ Correct Answer: C) Oviduct

Explanation:

• A) Uterus → embryo grows.
• B, D – Wrong.
• C) ✔ Fertilization happens in Fallopian tube.

Q64. Which is NOT true for external fertilization?

A) Takes place outside female body
B) Seen in fish and frogs
C) Produces zygote inside uterus
D) Needs release of many eggs

✅ Correct Answer: C) Produces zygote inside uterus

Explanation:

• A, B, D – Correct features.
• C) ✔ Internal fertilization forms zygote in uterus.

Q65. Which of the following organisms reproduces by regeneration?

A) Hydra
B) Amoeba
C) Planaria
D) Frog

✅ Correct Answer: C) Planaria

Explanation:

• A) Budding.
• B) Binary fission.
• C) ✔ Planaria regenerates missing body parts.
• D) Sexual reproduction.

Q66. What is implantation?

A) Release of egg from ovary
B) Fertilization of gametes
C) Fixing of embryo in uterus
D) Division of zygote

✅ Correct Answer: C) Fixing of embryo in uterus

Explanation:

• A) Ovulation.
• B) Fertilization.
• C) ✔ Embryo attaches to uterine wall.
• D) Cleavage.

Q67. Which type of reproduction ensures more variation?

A) Sexual reproduction
B) Asexual reproduction
C) Binary fission
D) Budding

✅ Correct Answer: A) Sexual reproduction

Explanation:

• A) ✔ Sexual → fusion of gametes → variation.
• B, C, D – Asexual → no variation.

Q68. Which organ is responsible for producing sperms?

A) Penis
B) Testis
C) Urethra
D) Prostate gland

✅ Correct Answer: B) Testis

Explanation:

• A, C, D – Supporting roles.
• B) ✔ Testes form sperms.

Q69. What type of reproduction is seen in Amoeba?

A) Budding
B) Binary fission
C) Regeneration
D) Multiple fission

✅ Correct Answer: B) Binary fission

Explanation:

• A, C, D – Not correct here.
• B) ✔ Amoeba divides into two → binary fission.

Q70. Which part of sperm helps to penetrate the egg?

A) Head (acrosome)
B) Tail
C) Middle piece
D) Cytoplasm

✅ Correct Answer: A) Head (acrosome)

Explanation:

• A) ✔ Acrosome releases enzymes to penetrate egg.
• B, C, D – Movement and energy.

Q71. Which of the following animals is oviparous?

A) Cow
B) Cat
C) Hen
D) Dog

✅ Correct Answer: C) Hen

Explanation:

• A, B, D – Viviparous.
• C) ✔ Hen lays eggs.

Q72. Which process leads to zygote formation?

A) Fertilization
B) Ovulation
C) Implantation
D) Gametogenesis

✅ Correct Answer: A) Fertilization

Explanation:

• A) ✔ Fusion of sperm and egg = zygote.
• B, C, D – Other processes.

Q73. Which type of reproduction requires only one parent?

A) Sexual reproduction
B) Asexual reproduction
C) Viviparous reproduction
D) Oviparous reproduction

✅ Correct Answer: B) Asexual reproduction

Explanation:

• A) Needs two parents.
• B) ✔ Asexual = single parent (e.g., Hydra, Amoeba).
• C, D – Not categories of parents.

Q74. In which type of reproduction is gamete formation not required?

A) Sexual reproduction
B) Asexual reproduction
C) Internal fertilization
D) External fertilization

✅ Correct Answer: B) Asexual reproduction

Explanation:

• A, C, D – All involve gametes.
• B) ✔ Asexual reproduction uses no gametes.

Q75. Which structure protects and nourishes the developing embryo in humans?

A) Ovary
B) Placenta
C) Oviduct
D) Urethra

✅ Correct Answer: B) Placenta

Explanation:

• A, C, D – Not protective organs.
• B) ✔ Placenta provides food, oxygen, removes waste.

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