HOW TO ORGANISM REPRODUCE

Time : ½ hour M.M. : 50 Do any 50 1 Mark Each

1. Variations within a species are most likely the result of

(a) Synapsis and disjunction (b) Over-population and recombination

2. New characters seen in the offspring which are not present in either of the parents is due to

(a) plant cuttings of a branch (b) recombination of chromosomes

3. Which structures are not involved in asexual reproduction ?

(a) Spindles (b) Chromosomes (c) Setae (d) Centromeres

4. There is a greater possibility for the evolution of a new species in organisms which reproduce by (a) binary fission (b) budding (c) fertilization (d) regeneration

5. Which is the most common method of reproduction in majority of fungi and bacteria ? (a) Budding (b) Spore formation (c) Binary fission (d) Multiple fission

6. Which of the following is not an artificial method of vegetative propagation (a) Cutting
(b) Layering (c) Budding (d) Grafting

7. Successfully grafted plants bear the flowers and fruits characteristic of the (a) stock (b) scion (c) either stock or scion (d) a mixture of stock and scion

8. Many unicellular organisms reproduce by the process of (a) fission (b) Ovulation (c) regeneration (d) non-disjunction

9. In roses, the method commonly used to produce new plants is (a) cutting (b) bud grafting (c) tissue culture (d) layering

10. The ability of an organism to develop whole body from a broken piece or fragment is called (a) binary fission (b) budding (c) multiple fission (d) regeneration

11. A multicellular organism reproducing asexually by regeneration is

(a) Cockroach (b) Planaria (c) Aspergillus (d) Yeast

12. Which is an incorrect statement ? (a) Cambium tissue is present in animals (b) In plants growth is restricted to certain parts only (c) In plants growth takes place throughout the life (d) In animals growth is uniform in all the parts

13. If the pollen is transferred to the stigma of the same flower, it is called (a) allogamy (b) autogamy (c) double fertilization (d) cross-pollination

14. At the time of entering into an ovule, the pollen tube has
(a) One gamete nucleus (b) Two male nuclei (c) Three male nuclei (d) Four male gametes

15. The collective name for sepals
(a) calyx (b) corolla (c) androecium (d) gynoecium

16. The group of stamens is called

(a) calyx (b) corolla (c) androecium (d) gynoecium

17. The individual units of corolla are called

(a) petals (b) sepals (c) stamens (d) pistils

18. Pollen grains are produced by

(a) ovary (b) ovule (c) anther (d) corolla

19. The fertilisation of human egg by the sperm takes place in

(a) vagina (b) uterus (c) ovary(d) oviduct

20. Which of the following is a primary sex organ in a mammal ?

(a) Ovary (b) Vagina (c) Uterus (d) Mammary glands

21. The ability to reproduce is lost in a female after

(a) fertilization (b) menstruation (c) gamete formation (d) menopause

22. When a perm is deposited into the vagina which route does it travel ?

(a) Vagina à Oviduct à Uterus à Cervix

(b) Vagina à Ovary à Uterus à Oviduct

(d) Vagina à Uterus à Cervix à Oviduct

23. In case of ova does not fertilise, which of the following events will take place ?

(a) Menstruation (b) Pregnancy (c) Implantation (d) Ovulation

24. When the foetus is growing inside the uterus it needs nutrients. Which part provides these nutrients ?

(a) Placenta (b) Amniotic sac (c) Oviduct (d) Uterus

25. What marks the beginning of the reproductive life of a woman ?

(a) Menopause (b) Menarche (c) Fertilisation (d) Ovulation

26. The gestation period in human beings is about

(a) 250 days (b) 300 days (c) 280 days (d) 200 days

27. Where does fertilization take place ?

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

28. The process of release of an egg from the ovary is called

(a) menstruation (b) fertilization (c) reproduction(d) ovulation

29. The accessory glands of human male reproductive system are

(a) One prostate gland, four seminal vesicles and two Cowper’s glands

(b) One prostate gland, two seminal vesicles and two Cowper’s glands

(d) Two prostate gland, two seminal vesicles and two Cowper’s glands

30. The development of foetus inside the uterus till birth is called (a) Lactation (b) Fertilisation (c) Gestation (d) Implantation

31. A pair of duct arising from testis, which carry sperms are

(a) fallopian tube (b) vas deferens (c) oviduct (d) urethra

32. Gonorrhoea is caused by a bacterium called

(a) Neisseria gonorrhoea (b) Treponema pallidum (c) Lactobacillus (d) Streptococcus

33. In the list of organisms given below, those that reproduce by the asexual method are

(i) banana (ii) dog (iii) yeast (iv) Amoeba

(a) (ii) and (iv) (b) (i), (iii) and (iv) (c) (i) and (iv) (d) (ii). (iii) and (iv)

34. In a flower, the parts that produce male and female gametes (germ cells) are

(a) stamen and anther (b) filament and stigma (c) anther and ovary (d) stamen and style

35. Which of the following is the correct sequence of events of sexual reproduction in a flower ?

(a) Pollination, fertilization, seedling, embryo (b) Seedling, embryo, fertilization, pollination

36. Offspring formed by asexual method of reproduction have greater similarity among themselves because

(i) asexual reproduction involves only one parent

(ii) asexual reproduction does not involve gametes

(iii) asexual reproduction occurs before sexual reproduction

(iv) asexual reproduction occurs after sexual reproduction

(a) (i) and (ii) (b) (i) and (iii) (c) (ii) and (iv) (d) (iii) and (iv)

37. Characters transmitted from parents to offspring are present in

(a) cytoplasm (b) ribosome (c) Golgi bodies (d) genes

38. Characters that are transmitted from parents to offspring during reproduction show

(a) only similarities with parents (b) only variations with parents

39. A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that

(a) they reproduce asexually (b) they are all unicellular

40. In Spirogyra, asexual reproduction takes place by

(a) breaking up of filaments into smaller bits (b) division of a cell into two cells

41. The ability of a cell to divide into several cells during reproduction in Plasmodium is called

(a) budding (b) reduction division (c) binary fission (d) multiple fission

42. The correct sequence of reproductive stages seen in flowering plants is

(a) gametes, zygote, embryo, seedling (b) zygote, gametes, embryo, seedling (c) seedling, embryo, zygote, gametes (d) gametes, embryo, zygote, seedling

43. The number of chromosomes in parents and offsprings of a particular species remains constant due to

(a) doubling of chromosomes after zygote formation (b) halving of chromosomes during gamete formation (c) doubling of chromosomes after gamete formation (d) halving of chromosomes after gamete formation

44. In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called

(a) filaments (b) hyphae (c) rhizoids (d) roots

45. Vegetative propagation refers to formation of new plants from

(a) stem, roots and flowers (b) stem, roots and leaves

46. Factors responsible for the rapid spread of bread mould on slices of bread are

(i) large number of spores (ii) availability of moisture and nutrients in bread

(iii) presence of tubular branched hyphae (iv) formation of round-shaped sporangia

(a) (i) and (iii) (b) (ii) and (iv) (c) (i) and (ii) (d) (iii) and (iv)

47. Length of pollen tube depends on the distance between

(a) pollen grain and upper surface of stigma (b) pollen grain on upper surface of stigma and ovule

48. Which of the following statements are true for flowers ?

(i) Flowers are always bisexual
(ii) They are the sexual reproductive organs

(iii) They are produced in all groups of plants

(iv) After fertilization they give rise to fruits

(a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii)(d) (ii) and (iv)

49. Which among the following statements are true for unisexual flowers ?

(i) They possess both stamen and pistil(ii) They possess either stamen or pistil(iii) They exhibit cross pollination (iv) Unisexual flowers possessing only stamens cannot produce fruits

(a) (i) and (iv) (b) (ii), (iii) and (iv) (c) (iii) and (iv)(d) (i), (iii) and (iv)

50. Which among the following statements are true for sexual reproduction in flowering plants ?

(i) It requires two types of gametes
(ii) Fertilization is a compulsory event

(iii) It always results in formation of zygote

(iv) Offspring formed are clones

(a) (i) and (iv) (b) (i), (iii) and (iv) (c) (i), (ii) and (iii)(d) (i), (ii) and (iv)

51. Offspring formed as a result of sexual reproduction exhibit more variations because

(a) sexual reproduction is a lengthy process

(b) genetic material comes from two parents of the same species

(d) genetic material comes from many parents

52. Reproduction is essential for living organisms in order to

(a) keep the individual organism alive (b) fulfill their energy requirement

53. During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys.(a) Loss of milk teeth (b) Increase in height (c) Cracking of voice (d) Weight gain

54. In human females, an event that reflects onset of reproductive phase is

(a) growth of body (b) changes in hair pattern (c) change in voice (d) menstruation

55. In human males, the testes lie in the scrotum, because it helps in the

(a) process of mating (b) formation of sperm (c) easy transfer of gamete (d) all the above

56. Which among the following is not the function of testes at puberty ?

(i) formation of germ cells (ii) secretion of testosterone (iii) development of placenta
(iv) secretion of estrogen (a) (i) and (ii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

57. The correct sequence of organs in the male reproductive system for transport of sperms is

(a) testis à vas deferens à urethra (b) testis à ureter à urethr (c) testis à urethra à ureter (d) testis à vasdeferens à ureter

58. Which among the following diseases is not sexually transmitted ?

(a) Syphillis (b) Hepatitis (c) HIV – AIDS (d) Gonorrhoea