Question

Class 8 Science MCQ Questions of Reproduction in Animals with Answers?

Answer 1

Students are encouraged to rehearse the MCQ Questions for class 8 Science Reproduction in Animals with Answers is out there here. MCQ Questions for class 8 Science with Answers are ready according to the latest Exam Pattern. Students can solve Class 8 MCQ Questions and survey their preparation level. 

MCQ Questions are frequently of most extreme assistance as you'll recollect every one of the ideas. These MCQ Questions with answers clear for a quick amendment of the Chapter in this manner assisting you with supporting subject information. students can get to effectively these Multiple choice Questions to concentrate well for the exam.

• Modes of Reproduction
• Sexual Reproduction
• Asexual Reproduction

Have a look at the MCQ Questions for class 8 and cross-check your answers during preparation.

Practice Class 8 Science MCQ Questions chapter-wise

1. The number of modes by which animals reproduce are

(a) two
(b) three
(c) four
(d) none of these

2. Binary fission is observed in

(a) Hydra
(b) yeast
(c) Amoeba
(d) human being

3. Asexual reproduction is observed in

(a) cow
(b) buffalo
(c) sponge
(d) hen

4. In Hydra, the mode of reproduction is

(a) asexual
(b) sexual
(c) both (a) and (b)
(d) none of these

5. The animals that produce new young ones are called

(a) viviparous
(b) oviparous
(c) both
(d) none of these

6. The male gamete or sperm consists of

(a) three parts
(b) two parts
(c) four parts
(d) none of these 

7. Ovum or eggs are formed in

(a) ovary
(b) testes
(c) oogenesis
(d) ovident

8. In humans, the early development of fertilized eggs take place in

(a) Ovary
(b) Testis
(c) Oviduct
(d) Uterus

9. The cell formed after fertilisation is called

(a) embryo
(b) foetus
(c) zygote
(d) egg

10. Sets of reproductive terms are given below. Choose the set that has an incorrect combination.

(a) Sperm, testis, sperm duct, penis
(b) Menstruation, egg, oviduct, uterus
(c) Sperm, oviduct, egg, uterus
(d) Ovulation, egg, oviduct, uterus

11. Which is not a viviparous animal?

(a) Human being
(b) Cow
(c) Dog
(d) Butterfly

12. Budding occurs in

(a) Amoeba
(b) dog
(c) Paramecium
(d) yeast

13. The number of eggs produced in internal fertilisation is

(a)  more than external fertilization
(b)  less than external fertilization
(c) more or less than external fertilisation depending on the environmental conditions
(d) equal to external fertilisation

14. How many parents are involved in sexual reproduction?

(a) 0
(b) 4
(c) 2
(d) 1

15. Which of the following is the site of fertilisation in humans?

(a)  Uterus
(b) Fallopian tube
(c) Ovary
(d) Vagina

16. Which of the following is not an oviparous animal?

(a) Cow
(b) Silkworm
(c) Hen
(d) Frog 

17. Name the process in which tadpoles develop into young frogs.

(a) Budding
(b) Fertilisation
(c) Metamorphosis
(d)  Embedding

18. The male gamete is called the

(a) Zygote
(b) Sperm
(c) Eggs
(d) ovaries

19. Female reproductive system in human beings contains 

(a) two pairs of ovaries
(b) single ovary
(c) a triplet of ovaries
(d) a pair of ovaries

20. What is the advantage of sexual reproduction over asexual reproduction?

(a) There is no advantage – asexual reproduction is more advantageous
(b) There are more variations
(c) Less number of offspring are produced
(d) Competition for food is less

21. Which of the following is an example of a viviparous animal?

(a) Cat
(b) Cobra
(c) Fish
(d)  Hen

22. The developing zygote is called:

(a) baby
(b) foetus
(c) embryo
(d) none of these

23. What is correct about test tube baby?

(a) Fertilization inside female genital tract and growth in test tube
(b) Rearing of prematurely born baby in incubator
(c) Fertilization outside and gestation inside womb of mother
(d) Both fertilization and development are effected outside the female genital tract

24. Dolly the famous animal was a

(a) donkey
(b) girl
(c) Cloned sheep
(d) Normal sheep

25. Internal fertilization occurs:

(a) in female body
(b) outside female body
(c) in male body
(d) outside male body

Answer 2

1. Answer: (a) two

Explanation: There are two modes of reproduction in animals and plants; they're referred to as sexually and asexually reproduction. Every living organism reproduces through two different modes of reproduction, i.e., sexual reproduction or asexual reproduction.

2. Answer: (c) Amoeba

Explanation: Binary fission is a type of asexual reproduction typically observed in prokaryotes and a few single-celled eukaryotes. In this method of asexual reproduction, there is a separation of the parent cell into two new daughter cells.

3. Answer: (c) sponge

Explanation: Sponges are also capable of asexual reproduction. This is accomplished by one of two mechanisms. external budding or internal budding. External budding is when a portion of the sponge breaks off and then regenerates into a complete organism.

4. Answer: (c) both (a) and (b)

Explanation: Hydra is a fresh water living organism which usually divides with the asexual mode of replication that is, budding. During unfavorable conditions, Hydra chooses a different mode of reproduction, i.e. Sexual mode of reproduction.

5. Answer: (a) viviparous

Explanation: Animals that give birth to their young ones are called viviparous. The young ones resemble their parents. Oviparous animals lay eggs while ovo-viviparous organisms produce eggs that develop and hatch inside the mother's body till they are fully developed and born alive.

6. Answer: (a) three parts

Explanation: The sperm basically consists of three parts: Head, Tail and Middle piece. 

7. Answer: (c) oogenesis

Explanation: The process through which ova are formed is known as "oogenesis".

8. Answer: (c) Oviduct

Explanation: In a human early development of fertilized egg takes place in the fallopian tube (oviduct). Zygote enters the uterus 3rd day after fertilization (morula stage).

9. Answer: (c) zygote 

Explanation: Fertilization is the fusion of the male and female sex gametes so as to produce an embryo/zygote. This 2-celled embryo is called the zygote.

10. Answer: (c) Sperm, oviduct, egg, uterus

Explanation: Sperms are generally released by the testis. Sperm duct opens up into the penis to ejaculate the sperm.The unfertilized egg is shed off during menstruation. The uterine tubes are also known as oviduct. In human beings, sperm is released into the oviduct which fertilises with the egg to form a zygote. Eggs develop in the ovary and are ovulated by them.Ovulation leads to the release of the egg. The uterine tubes are also known as oviduct. 

11. Answer: (d) Butterfly

Explanation: Butterfly is not a viviparous animal. Animals such as hen, frog, lizard and butterfly which lay eggs are called oviparous animals.

12. Answer: (d) yeast

Explanation: Budding occurs in yeast.

13. Answer: (b)  less than external fertilization

Explanation: In the case of external fertilisation, the number of eggs produced is more than the number of eggs produced in internal fertilisation. External fertilisation usually occurs in aquatic animals. These animals lay hundreds of eggs and release millions of sperms. However, many of the eggs do not get fertilised (fuse with sperm) to develop into new individuals. This is because the eggs and sperm get exposed to water currents and wind. Also, there are other animals (predators) which may feed on these eggs. Thus, production of a large number of eggs and sperm is necessary to ensure fertilisation of at least a few of them.

14. Answer: (c) 2

Explanation: In sexual reproduction such as humans, two parents are required. In the case of plants, male and female reproductive parts are required.

15. Answer: (b) Fallopian tube

Explanation: Fertilisation is the fusion of male and female gametes. In human beings, it takes place in the fallopian tube of the female reproductive system.

16. Answer: (a) Cow

Explanation: Animals like cows, cats and dogs give birth to young individuals, hence they are called viviparous animals whereas frogs, hens and silkworms lay eggs, and hence they are called oviparous. 

17.Answer: (c) Metamorphosis

Explanation: The transformation of the larva into an adult through drastic changes is called metamorphosis. Frogs, butterflies, silkworm, etc., undergo metamorphosis.

18. Answer: (b) Sperm

Explanation: Male gametes in humans are called sperms. Sperms are produced by testes. Sperms fuse with egg produced by ovaries to form a zygote.

19. Answer: (d) a pair of ovaries

Explanation: The testes is a part of the male reproductive system that produce male gametes called sperms. Sperms fuse with the female gamete, ovum to form the zygote. Zygote develops into the embryo which later develops into the foetus.

20. Answer: (b) There are more variations

Explanation: Since the characteristics of two individuals are combined in sexual reproduction, more variations are seen in the offspring. More variations in offspring ensure better survival in changing environmental conditions.

21. Answer: (a) Cat

Explanation: Viviparous animals give birth to their young ones. Cat is an example of an animal that gives birth to it’s young ones. On the other hand, hen, fish and cobra lay eggs and are termed as oviparous animals.

22. Answer: (c) embryo

Explanation: The developing zygote is called embryo.

23. Answer: (c) Fertilization outside and gestation inside womb of mother

Explanation: In vitro fertilization (IVF) is a process by which an egg is fertilized by sperm outside the body: in-vitro. The process involves monitoring and stimulating a woman's ovulatory process, removing ovum or ova (egg or eggs) from the woman's ovaries and letting sperm fertilize them in a liquid in a laboratory. The fertilized egg (zygote) is cultured in a growth medium and is then implanted in the same or another woman's uterus, with the intention of establishing a successful pregnancy.

24. Answer: (c) Cloned sheep

Explanation: Dolly (5 July 1996 – 14 February 2003) was a female Finnish Dorset sheep and the first mammal cloned from an adult somatic cell.

25. Answer: (a) in a female body

Explanation: Internal fertilization occurs most often in land-based animals, although some aquatic animals also use this method. ... In oviparity, fertilized eggs are laid outside the female's body and develop there, receiving nourishment from the yolk that is a part of the egg.

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