CBSE Class 10 Science Chapter-8 How do Organisms Reproduce? Important Questions – Free PDF Download
Free PDF download of Important Questions with Answers for CBSE Class 10 Science Chapter 8 – How do Organisms Reproduce? prepared by expert Science teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination.
CBSE Class 10 Science Chapter-8 How do Organisms Reproduce? Important Questions
CBSE Class 10 science Important Questions Chapter 8 – How do Organisms Reproduce?
1 Mark Questions
1. In vegetative reproduction, the new individuals are genetically –
a) Similar
b) Dissimilar
c) Abnormal
d) None of these
Ans. a) Similar
2. When an organism breaks into a number of parts and each part develop into an individual, it is called –
a) Budding
b) Binary fission
c) Regeneration
d) Spore formation
Ans. c) Regeneration
3. In man, fertilization of ovum takes place in
a) Vagina
b) ovary
c) uterus
d) Fallopian tubes
Ans. d) Fallopian tubes
4. Define parthenogenesis.
Ans. Development of organism from an unfertilized egg.
5. How may male gametes are produced by pollen grains?
Ans. Two
6. During grafting, the portion of plant that is grafted is called –
a) Stock
b) Scion
c) stalk
d) stem
Ans. b) Scion
7. Which part of the flower forms the fruit?
a) Whole flower
b) Only stamens and carpel
c) Only ovary
d) Only carpel
Ans. c) Only ovary
8. Anemophily is the pollination by –
a) Birds
b) Rain
c) insects
d) Wind
Ans. d) Wind
9. What is syngamy?
Ans. Fusion of male gamete with the egg cell is called syngamy.
10. Name the structure through which pollen tubes enters the ovule.
Ans. Stigma
11. A common feature of reproduction in Amoeba, spirogyra and yeast is that –
a) Asexual reproduction occurs after sexual reproduction
b) Asexual reproduction occurs before sexual reproduction
c) Asexual reproduction does not involve gametes
d) Asexual reproduction involves only one parent
Ans. (d) Asexual reproduction involves only one parent.
12. The normal duration of menstrual cycle is
a) 7 – 8 days
b) 13 – 15 days
c) 3 – 4 days
d) 28 days
Ans. d) 28 days
13. Which of the following is an IUCD?
a) copper – T
b) diaphragm
c) oral pills
d) tubectomy
Ans. a) copper – T
14. What is parturition?
Ans. Parturition – The birth of fully developed foetus in completion of gestation.
15. What is puberty?
Ans. Puberty – Age when reproductive system functionally active or starts producing ova or sperm is called puberty.
16. Fertilization in plants occurs in the –
a) Embryo sac
b) Style
c) Pollen tube
d) Stigma
Ans. a) Embryo sac
17. Characters that are transmitted from parents to offspring during reproduction show
a) only similarities with parents
b) only variations with parents
c) neither similarities nor variations
d) both similarities and variations with parents
Ans. d) both similarities and variations with parents
18. Which among the following diseases is not sexually transmitted?
a) syphilis
b) Gonorrhoea
c) HIV – AIDS
d) Hepatitis
Ans. d) Hepatitis
19. What is tubectomy?
Ans. Removal of a section of fallopian tube.
20. Name the causative organism, of AIDS?
Ans. HIV – Human Immunodeficiency virus.
21. A common feature of reproduction in Amoeba, spirogyra and yeast is that –
a) They reproduce only sexually
b) They are all unicellular
c) they reproduce asexually
d) They are all multicellular
Ans. They reproduce asexually
22. Which of this is seminal fluid?
a) Prostate gland
b) Cowper’s gland
c) Seminal vesicle
d) all of these
Ans. c) Seminal vesicle
23. At the time of entering into ovule, pollen tube has
a) three male nuclei
b) two mole nuclei
c) one gamete nucleus
d) four male gametes
Ans. Two male nuclei
24. How many follicles mature every month during the reproductive phase of human female?
Ans. One egg is produced every month by one of the ovaries
25. What is the product of fertilization?
Ans. Zygote
26. Asexual reproduction takes place through budding in
(a) Amoeba
(b) Yeast
(c) Plasmodium
(d) Leishmania.
Ans. (b) Yeast
27. Which of the following is not a part of female reproductive system in human beings?
(a) Ovary
(b) Uterus
(c) Vas deferens
(d) Fallopian tube
Ans. (c) Vas deferens
28. The anther contains
(a) Sepals
(b) Ovules
(c) Carpel
(d) Pollen grains.
Ans. (d) Pollen grains.
29. The simple animals such as planaria can be cut into number of pieces and each piece grows into a complex organism. What is this process known as?
Ans. Regeneration
30. Name the unicellular organism which caused the disease known as kala-azar.
Ans. Leishmania
31. Which process taking place in the nucleus of a cell leads to variation in the offspring during reproduction?
Ans. DNA copying
32. Which type of layering is done in Jasmine?
Ans. Air Layering (Gootee)
33. Where does fertilization takes place in human female?
Ans. Oviduct (fallopian tube)