Class 10 Science MCQ Chapter 8 How do Organisms Reproduce, Class 10 Science MCQ Question Answer, Class 10 Science Multiple Choice Question Answer to each chapter is provided in the list of SCERT Science Class 10 Objective Types Question Answer so that you can easily browse through different chapters and select needs one. Class 10 Science MCQ Chapter 8 How do Organisms Reproduce Question Answer can be of great value to excel in the examination.
SCERT Class 10 Science MCQ Chapter 8 How do Organisms Reproduce
SCERT Class 10 General Science MCQ Chapter 8 How do Organisms Reproduce Notes covers all the exercise questions in SCERT Science Textbooks. The NCERT Class 10 Science MCQ Chapter 8 How do Organisms Reproduce provided here ensures a smooth and easy understanding of all the concepts. Understand the concepts behind every chapter and score well in the board exams.
How do Organisms Reproduce
Chapter – 8
Multiple Choice Questions & Answers
1. Which part of the cell contains the information for inheritance of parental features to next generation-
(a) Cytoplasm.
(b) Chromosomes.
(c) Nucleoplasm.
(d) Nucleolus.
Ans: (b) Chromosomes.
2. Which one of the following is referred to as the information source for making proteins-
(a) Nucleus.
(b) DNA.
(c) Nucleolus.
(d) Nucleoplasm.
Ans: (b) DNA.
3. Amoeba reproduces by which of the following mode-
(a) Regeneration.
(b) Fragmentation.
(c) Spore formation.
(d) Fission.
Ans: (d) Fission.
4. Plasmodium reproduces by-
(a) Binary Fission.
(b) Regeneration.
(c) Multiple Fission.
(d) Budding.
Ans: (c) Multiple Fission.
5. Planaria reproduces by-
(a) Regeneration.
(b) Budding.
(c) Fission.
(d) Spore formation.
Ans: (a) Regeneration.
6. Reproduction in Bryophyllum is an example of –
(a) Budding.
(b) Vegetative propagation.
(c) Fission
(d) Spore formation.
Ans: (b) Vegetative propagation.
7. Rhizopus reproduces by-
(a) Vegetative propagation.
(b) Budding.
(c) Fission.
(d) Spore formation.
Ans: (d) Spore formation.
8. The cell formed by the fusion of a male and a female gamete is called –
(a) Embryo.
(b) Ovam.
(c) Zygote.
(d) Sperm.
Ans: (c) Zygote.
9. The fusion of germ-cells is known as –
(a) Germination.
(b) Fertilisation.
(c) Cross-pollination.
(d) Self-pollination.
Ans: (b) Fertilisation.
10. Which of the following part of a flower converts into a seed-
(a) Ovule.
(b) Ovary.
(c) Stigma.
(d) Carpel.
Ans: (a) Ovule.
11. Which of the following part of a flower converts into a fruit –
(a) Ovule.
(b) Ovary.
(c) Petals.
(d) Sepals.
Ans: (b)Ovary.
12. The hormone responsible for the changes in appearance seen in boys at the time of puberty-
(a) Oestrogen.
(b) Thyroxin.
(c) Testosterone.
(d) Insulin.
Ans: (c) Testosterone.
13. The hormone responsible for the change in appearance seen in girls at the time of puberty –
(a) Insulin.
(b) Growth hormone.
(c) Testosterone.
(d) Oestrogen.
Ans: (d) Oestrogen.
14. Which one of the following is not a part of male reproductive system in human beings –
(a) Urethra.
(b) Fallopian tube.
(c) Vas deferens.
(d) Prostate gland.
Ans: (b) Fallopian tube.
15. Female germ cells or eggs are produced in –
(a) Oviduct.
(b) Uterus.
(c) Ovaries.
(d) Vagina.
Ans: (c) Ovaries.
Very Short & Short Type Questions and Answers:
1. What is reproduction?
Ans: Reproduction is a process by which an organism creates new individuals that look very much like itself.
2. Define asexual reproduction.
Ans: The mode of reproduction in which new generations are created from a single individual is called asexual reproduction.
3. Define sexual reproduction.
Ans: The mode of reproduction in which new generations are created by the involvement of two individuals is known as sexual reproduction.
4. Mention the mechanism which is responsible for the similarity of the offsprings with their parents.
Ans: DNA copying.
5. Which causes the offsprings to look similar to their parents but still not identical?
Ans: The variations in the process of DNA copying makes the offspring to look similar to their parents but still not identical.
6. Which part of our nucleus of cells contains the information for inheritance of features from parents to next generation?
Ans: Chromosomes.
7. Which is referred to as the information source for making proteins?
Ans: The DNA in the cell nucleus]
8. What is referred to as the basic event of reproduction?
Ans: Creation of a DNA copy.
9. What is termed as the basis of evolution?
Ans: The inbuilt tendency for variation in the DNA copying during reproduction is termed as the basis of evolution.
10. What is fission?
Ans: Fission is a mode of asexual reproduction in which unicellular organisms split into two or more daughter cells by the process of cell division.
11. What is binary fission?
Ans: The mode of reproduction in which a single-celled organism simply splits into two equal halves during cell division is called binary fission.
12. What is multiple fission?
Ans: The mode of reproduction in which some single-celled organisms divide into many daughter cells simultaneously is called multiple fission.
13. Name the mode of asexual reproduction shown by Amoeba.
Ans: Binary fission.
14. How does Leishmania reproduce?
Ans: Leishmania reproduces by means of binary fission. This type of fission occurs in a definite orientation in relation to the whiplike structures the organisms have.
15. How do yeasts reproduce?
Ans: By budding.
16. What do you mean by fragmentation?
Ans: Fragmentation is a mode of asexual reproduction in which multicellular organisms with relatively simple body organisation, break up into smaller pieces upon maturation. These pieces or fragments grow into new individuals.
17. What is regeneration?
Ans: When an individual is somehow cut or broken up into many pieces, many of these pieces can grow into separate individuals. This mode of asexual reproduction is known as regeneration.
18. What means does the Bread mould or Rhizopus use to reproduce?
Ans: By spore formation.
19. Which part of a flower produces pollen grains?
Ans: The stamens.
20. What are the parts of a carpel?
Ans: Ovary, style and stigma.
21. Name the parts of a flower that produce male and female germ-cells respectively.
Ans: The part of flower that produces male germ-cells is known as pollen grains and the part of flower that produces female germ-cells is known as ovules present in the ovary.
22. What is fertilisation?
Ans: Fertilisation is a process in which the male germ-cell produced by pollen grains fuses with the female gamete present in the ovule in plants.
23. What is a zygote?
Ans: A zygote is the cell which is produced by the fusion of a male gamete with a female gamete during the process of fertilisation in plants.
24. What is pollination?
Ans: The transfer of pollen grains from the stamen to the stigma of a carpel in a flower is called pollination.
25. What do you mean by self-pollination?
Ans: When the transfer of pollen grains from the stamen to the occurs in the same flower, then it is referred to as self-pollination.
26. What is cross-pollination?
Ans: When the transfer of pollen from the stamen to the stigma occurs between two different flowers, then it is referred to as cross-pollination.
27. Name three agents that help in pollination.
Ans: (i) Wind.
(ii) Water. and
(iii) Animals.
28. Which part of a flower is converted to a seed?
Ans: The ovule present in the ovary is converted into a seed.
29. Which part of a flower is converted into a fruit?
Ans: The ovary.
30. What do you mean by germination?
Ans: The seed produced inside an ovary contains the future plant or embryo which develops into a seedling under appropriate conditions. This process is known as germination.
31. What do you mean by puberty?
Ans: The period during adolescence in which the rate of general body growth begins to slow down and reproductive tissues begin to mature is called puberty.
32. Which part of the male reproductive system is concerned with the formation of male germ-cells or sperms in human beings?
Ans: The testes.
33. Name the part of human body where the testes are located in male.
Ans: Scrotum.
34. Why is the part scrotum located outside the abdominal cavity?
Ans: The scrotum contains the testes which are the site for production of male germ-cells or sperms in human body. As the sperm formation requires lower temperature than the normal body temperature, the scrotum is located outside the abdominal cavity.
35. Through which tube in human male body, the sperms formed in testes are delivered?
Ans: Through vas deferens.
36. Name the part of female reproductive system in human beings which is concerned with the formation of eggs or female gamete.
Ans: The ovaries.
37. Name the tube which transfers eggs from the ovaries to the womb in female human body.
Ans: Ovi- duct or fallopian tube.
38. What is uterus?
Ans: The two oviducts in female human body unite into an elastic bag-like structure known as uterus.
39. Where does fertilisation occur in a female human body?
Ans: In the fallopian tube.
40. Where does the fertilised egg or zygote get implanted in a female human body?
Ans: In the lining of uterus.
41. What happens when an egg is not fertilised in a female human body?
Ans: When an egg is not fertilised in a female human body, the thickened lining of the uterus slowly breaks and comes out through vagina as blood and mucous.
42. Name two sexually transmitted diseases caused by the infection of bacteria.
Ans: (i) Gonorrhoea. and
(ii) Syphilis.
43. Name two sexually transmitted diseases caused by the infection of virus.
Ans: HIV-AIDS, Warts.
44. What is contraception?
Ans: Contraception refers to some specific methods to avoid preg-nancy.
45. Which contraceptive method creates a mechanical barrier so that sperm does not reach the egg?
Ans: Use of condoms.
46. What contraceptive method is used to change hormonal balance of the body so that eggs are not fertilised in female human body?
Ans: Use of oral pills.
47. What is the disadvantage of using oral pills as a contraceptive method?
Ans: As they change the hormonal balance of the body, they can have some side-effects too.
48. What is the disadvantage of using a loop or copper-T as a contraceptive method?
Ans: They can cause side-effects due to irritation of the uterus.
49. How do surgical methods work as a means for contraception?
Ans: Surgical methods are used to block the vas deferens in male to prevent transfer of sperms and to block the fallopian tube to prevent the eggs from reaching the uterus.
50. What is the disadvantage of surgical methods as a means of contraception?
Ans: Surgery can cause infections and other problems if not performed properly.
51. What is Placenta?
Ans: Placenta is a special tissue with the help of which the embryo gets nutrition from the mother’s blood.
52. Name the tissue in female human body which transfers the waste substances generated by an embryo to the mother’s blood.
Ans: Placenta.
53. What is reproductive Health?
Ans: Reproductive health refers to a state of well-being of the reproductive system and its functioning, along with a sound condition mentally, physically and socially.
54. Name the organ in female human being which receives and nurtures a growing embryo.
Ans: Uterus.
