🐣 Reproduction in Animals – MCQs for Class 8 Science

Part 4: Q76–Q100

Q76. Which of the following organisms reproduce by budding?

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

✅ Correct Answer: B) Hydra

Explanation:

• A) Amoeba – Binary fission.
• B) ✔ Hydra develops buds from its body wall.
• C) Planaria – Regeneration.
• D) Fish – Sexual reproduction.

Q77. Which is the largest cell in the human body?

A) Sperm
B) Ovum
C) Nerve cell
D) Muscle cell

✅ Correct Answer: B) Ovum

Explanation:

• A) Sperm – Smallest male gamete.
• B) ✔ Ovum is the largest human cell.
• C) Nerve cell – Longest, not largest.
• D) Muscle cell – Large but smaller than ovum.

Q78. Which of the following animals lays eggs?

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

✅ Correct Answer: B) Hen

Explanation:

• A, C, D – Viviparous animals.
• B) ✔ Hen is oviparous.

Q79. Which is the smallest cell in the human body?

A) Ovum
B) RBC
C) Sperm
D) Nerve cell

✅ Correct Answer: C) Sperm

Explanation:

• A) Ovum – Largest.
• B) RBC – Small, but not the smallest.
• C) ✔ Sperm is the smallest cell in humans.
• D) Nerve cell – Longest.

Q80. What is the function of the sperm head?

A) Movement
B) Energy production
C) Contains DNA and enzymes
D) Food storage

✅ Correct Answer: C) Contains DNA and enzymes

Explanation:

• A) Movement → tail.
• B) Middle piece → energy.
• C) ✔ Head contains nucleus (DNA) + acrosome enzymes.
• D) Not correct.

Q81. The first stage after fertilization is:

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

✅ Correct Answer: C) Zygote

Explanation:

• A, B – Later stages.
• C) ✔ Zygote forms first after fusion.
• D) Ovum → before fertilization.

Q82. Which organ produces both eggs and hormones in females?

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

✅ Correct Answer: B) Ovary

Explanation:

• A, C, D – Do not produce eggs.
• B) ✔ Ovaries produce eggs and hormones (estrogen, progesterone).

Q83. Which reproductive method shows the fastest increase in population?

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

✅ Correct Answer: B) Asexual reproduction

Explanation:

• A, C, D – Slower processes.
• B) ✔ Asexual is rapid, one parent only.

Q84. Which animal reproduces through external fertilization?

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

✅ Correct Answer: B) Frog

Explanation:

• A, C, D – Internal fertilization.
• B) ✔ Frogs lay eggs in water, fertilization external.

Q85. In humans, embryo gets nutrition from the mother through:

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

✅ Correct Answer: C) Placenta

Explanation:

• A, B, D – Not nutrition sources.
• C) ✔ Placenta provides nutrients, oxygen, removes wastes.

Q86. Which organ stores the developing foetus in humans?

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

✅ Correct Answer: C) Uterus

Explanation:

• A, B, D – Not storage.
• C) ✔ Uterus is the “womb” for embryo/foetus.

Q87. Which statement about asexual reproduction is correct?

A) Two parents are involved
B) Gametes are produced
C) Offspring are identical to parent
D) It occurs only in animals

✅ Correct Answer: C) Offspring are identical to parent

Explanation:

• A, B – True for sexual.
• C) ✔ Asexual offspring are clones.
• D) Occurs in both plants and animals.

Q88. Which animal reproduces by binary fission?

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

✅ Correct Answer: B) Amoeba

Explanation:

• A) Hydra → budding.
• B) ✔ Amoeba → divides into two by binary fission.
• C) Planaria → regeneration.
• D) Frog → sexual reproduction.

Q89. Which organ system is directly involved in reproduction?

A) Circulatory system
B) Digestive system
C) Reproductive system
D) Excretory system

✅ Correct Answer: C) Reproductive system

Explanation:

• A, B, D – Other functions.
• C) ✔ Responsible for gamete production and fertilization.

Q90. Which of these is NOT a viviparous animal?

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

✅ Correct Answer: C) Hen

Explanation:

• A, B, D – Give birth.
• C) ✔ Hen lays eggs (oviparous).

Q91. What is the main advantage of sexual reproduction?

A) Faster reproduction
B) Large number of offspring
C) Variation in offspring
D) Requires only one parent

✅ Correct Answer: C) Variation in offspring

Explanation:

• A, B, D – Features of asexual reproduction.
• C) ✔ Variation increases adaptability.

Q92. The cell formed after fertilization is:

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

✅ Correct Answer: B) Zygote

Explanation:

• A) Gamete → before fusion.
• B) ✔ Fertilization forms zygote.
• C, D – Later stages.

Q93. Which part of sperm contains mitochondria?

A) Head
B) Middle piece
C) Tail
D) Acrosome

✅ Correct Answer: B) Middle piece

Explanation:

• A, D – DNA and enzymes.
• B) ✔ Middle piece → energy.
• C) Tail → motility.

Q94. Which of these animals shows internal fertilization?

A) Frog
B) Fish
C) Cat
D) Toad

✅ Correct Answer: C) Cat

Explanation:

• A, B, D – External fertilization.
• C) ✔ Cats → internal fertilization.

Q95. Which stage shows body parts forming but not fully developed?

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

✅ Correct Answer: C) Embryo

Explanation:

• A, B – Early cells.
• C) ✔ Embryo shows basic organs developing.
• D) Foetus → developed organs.

Q96. In which organ of male human body are sperms stored temporarily?

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

✅ Correct Answer: B) Epididymis

Explanation:

• A, C, D – Not storage.
• B) ✔ Epididymis stores sperms.

Q97. Which statement is true for viviparous animals?

A) Eggs hatch outside the body
B) Fertilization occurs in water
C) They give birth to young ones
D) They do not produce gametes

✅ Correct Answer: C) They give birth to young ones

Explanation:

• A, B, D – Wrong.
• C) ✔ Viviparous = give birth.

Q98. Which of these is a female reproductive organ?

A) Penis
B) Testis
C) Ovary
D) Urethra

✅ Correct Answer: C) Ovary

Explanation:

• A, B, D – Male structures.
• C) ✔ Ovary produces eggs.

Q99. Which organ connects uterus to outside the body in females?

A) Ovary
B) Cervix and vagina
C) Oviduct
D) Placenta

✅ Correct Answer: B) Cervix and vagina

Explanation:

• A, C, D – Not passageways.
• B) ✔ Cervix + vagina form the birth canal.

Q100. Which process results in offspring that are genetically identical to the parent?

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

✅ Correct Answer: B) Asexual reproduction

Explanation:

• A, C, D – Involve gametes and variation.
• B) ✔ Asexual reproduction produces clones.

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