NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-4 | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 12 | TOPIC : SEXUAL REPRODUCTION IN FLOWERING PLANTS | QB-4 | NEET BIOLOGY ONLINE TEST

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It contains 66 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 1. Apomictic embryos in citrus arise from [AIPMT PRE 2010]

(a) Synergids (b) Maternal sporophytic tissue in ovule (c) Antipodal cells (d) Diploid egg

2 ➤ 2. Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called [AIPMT PRE 2010]

(a) Xenogamy (b) Geitonogamy (c) Karyogamy (d) Autogamy

3 ➤ 3. The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons? [AIPMT PRE 2010]

(a) Cotyledon (b) Endosperm (c) Aleurone layer (d) Plumule

4 ➤ 4. Wind pollinated flowers are [AIPMT PRE 2010]

(a) Small, brightly coloured, producing large number of pollen grains (b) Small, producing large number of dry pollen grains (c) Large, producing abundant nectar and pollen (d) Small, producing nectar and dry pollen

5 ➤ 5. Filliform apparatus is a characteristic feature of [AIPMT PRE 2011]

(a) Egg (b) Synergid (c) Zygote (d) Suspensor

6 ➤ 6. What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells? [AIPMT PRE 2011]

(a) 63 (b) 84 (c) 21 (d) 42

7 ➤ 7. Wind pollination is common in [AIPMT PRE 2011]

(a) Lilies (b) Grasses (c) Orchids (d) Legumes

8 ➤ 8. Nucellar polyembryony is reported in the species of [AIPMT PRE 2011]

(a) Gossypium (b) Triticum (c) Brassica (d) Citrus

9 ➤ 9. In which one of the following, pollination is autogamous? [AIPMT PRE 2011]

(a) Xenogamy (b) Chasmogamy (c) Cleistogamy (d) Geitonogamy

10 ➤ 10. In angiosperms, functional megaspore develops into [AIPMT MAINS 2011]

(a) Embryo sac (b) Ovule (c) Endosperm (d) Pollen sac

11 ➤ 11. What is common between vegetative reproduction and apomixis? [AIPMT MAINS 2011]

(a) Both are applicable to only dicot plants (b) Both bypass the flowering phase (c) Both occur round the year (d) Both produce progeny identical to the parent

12 ➤ 12. Plants with ovaries having only one or a few ovules are generally pollinated by [AIPMT MAINS 2012]

(a) Butterflies (b) Birds (c) Wind (d) Bees

13 ➤ 13. What is the function of germ pore? [AIPMT MAINS 2012]

(a) Absorption of water for seed germination (b) Initiation of pollen tube (c) Release of male gametes (d) Emergence of radical

14 ➤ 14. Which one of the following statements is wrong? [AIPMT MAINS 2012]

(a) Vegetative cell is larger than generative cell. (b) Pollen grains in some plants remain viable for months. (c) Intine is made up of cellulose and pectin. (d) When pollen is shed at two-celled stage, double fertilization does not take place.

15 ➤ 15. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is [AIPMT PRE 2012]

(a) Cuticle (b) Sporopollenin (c) Lignin (d) Cellulose

16 ➤ 16. Even in the absence of pollinating agents seed-setting is assured in [AIPMT PRE 2012]

(a) Commelina (b) Zostera (c) Salvia (d) Fig

17 ➤ 17. The coconut water and the edible part of coconut are equivalent to [AIPMT PRE 2012]

(a) Endosperm (b) Endocarp (c) Mesocarp (d) Embryo

18 ➤ 18. Both, autogamy and geitonogamy are prevented in [AIPMT PRE 2012]

(a) Papaya (b) Cucumber (c) Castor (d) Maize

19 ➤ 19. The gynoecium consists of many free pistils in flowers of [AIPMT PRE 2012]

(a) Aloe (b) Tomato (c) Papaver (d) Michelia

20 ➤ 20. Which one of the following statements is correct? [AIPMT 2013]

(a) Hard outer layer of pollen is called intine. (b) Sporogenous tissue is haploid. (c) Endothecium produces the microcspores. (d) Tapetum nourishes the developing pollen.

21 ➤ 21. The advantage of cleistogamy is [AIPMT 2013]

(a) Higher genetic variability (b) More vigorous offspring (c) No dependence on pollinators (d) Vivipary

22 ➤ 22. Perisperm differs from endosperm in [AIPMT 2013]

(a) Being a haploid tissue (b) Having no reserve food (c) Being a diploid tissue (d) Its formation by fusion of secondary nucleus with several sperms

23 ➤ 23. Geitonogamy involves [AIPMT 2014]

(a) Fertilization of a flower by the pollen from another flower of the same plant. (b) Fertilization of a flower by the pollen from the same flower. (c) Fertilization of a flower by the pollen from a flower of another plant in the same population. (d) Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population.

24 ➤ 24. Male gametophyte with least number of cells is present in [AIPMT 2014]

(a) Pteris (b) Funaria (c) Lilium (d) Pinus

25 ➤ 25. Pollen tablets are available in the market for [AIPMT 2014]

(a) In vitro fertilization (b) Breeding programmes (c) Supplementing food (d) Ex situ conservation

26 ➤ 26. The function of filiform apparatus is to [AIPMT 2014]

(a) Recognize the suitable pollen at stigma (b) Stimulate division of generative cell (c) Produce nectar (d) Guide the entry of pollen tube

27 ➤ 27. Non-albuminous seed is produced in [AIPMT 2014]

(a) Maize (b) Castor (c) Wheat (d) Pea

28 ➤ 28. Which one of the following may require pollinators, but it is genetically similar to autogamy? [AIPMT 2015]

(a) Geitonogamy (b) Xenogamy (c) Apogamy (d) Cleistogamy

29 ➤ 29. Which one of the following statements is not true? [AIPMT 2015]

(a) Pollen grains are rich in nutrients and they are used in the form on tablets and syrups. (b) Pollen grains of some plants cause severe allergies and bronchial affliations in some people. (c) The flowers pollinated by flies and bats secrete foul odour to attract them. (d) Honey is made by bees by digesting pollen collected from flowers.

30 ➤ 30. Transmission tissue is the characteristic feature of [AIPMT 2015]

(a) Hollow style (b) Solid style (c) Dry stigma (d) Wet stigma

31 ➤ 31. Which of the following are the important floral rewards to the animal pollinators? [AIPMT 2015]

(a) Colour and large size of flower (b) Nectar and pollen grains (c) Floral fragrance and calcium crystals (d) Protein pellicle and stigmatic exudates

32 ➤ 32. Male gametophyte in angiosperms produces [RE-AIPMT 2015]

(a) Single sperm and a vegetative cell (b) Single sperm and two vegetative cells (c) Three sperms (d) Two sperms and a vegetative cell

33 ➤ 33. Coconut water from a tender coconut is [RE-AIPMT 2015]

(a) Free nuclear endosperm (b) Innermost layers of the seed coat (c) Degenerated nucellus (d) Immature embryo

34 ➤ 34. Which one of the following fruits is parthenocarpic? [RE-AIPMT 2015]

(a) Apple (b) Jackfruit (c) Banana (d) Brinjal

35 ➤ 35. Filiform apparatus is characteristic feature of: [RE-AIPMT 2015]

(a) Nucellar embryo (b) Aleurone cell (c) Synergids (d) Generative cell

36 ➤ 36. In angiosperms, microsporogeneis and megasporogenesis: [RE-AIPMT 2015]

(a) From gametes without further divisions (b) Involve meiosis (c) Occur in ovule (d) Occur in anther

37 ➤ 37. The correct water from tender coconut represents: [NEET - I, 2016]

(a) Endocarp (b) Fleshy mesocarp (c) Free nuclear proembryo (d) Free nuclear endosperm

38 ➤ 38. Proximal end of the filament of stamen is attached to the: [NEET - I, 2016]

(a) Anther (b) Connective (c) Placenta (d) Thalamus or petal

39 ➤ 39. Which one of the following statements is not true? [NEET - I, 2016]

(a) Tapetum helps in the dehiscence of anther (b) Exine of pollen grains is made up of sporopollenin (c) Pollen grains of many species cause severe allergies (d) Stored pollen in liquid nitrogen can be used in the crop breeding programmes

40 ➤ 40. Seed formation without fertilization in flowering plants involves the process of: [NEET - I, 2016]

(a) Sporulation (b) Budding (c) Somatic hybridization (d) Apomixis

41 ➤ 41. Which of the following statements is not correct? [NEET - I, 2016]

(a) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style (b) Insects that consume pollen or nectar without bringing about pollination are called pollen nectar robbers (c) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil (d) Some reptiles have also been reported as pollinators in some plant species

42 ➤ 42. Which one of the following generate new genetic combinations leading to variation? [NEET - II, 2016]

(a) Parthenogenesis (b) Sexual reproduction (c) Nucellar polyembryony (d) Vegetative reproduction

43 ➤ 43. Match Column – I with Column – II and select the correct option using the codes given below: [NEET - II, 2016]

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A. Pistils fused together 1. Gametogenesis

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B. Formation of gametes 2. Pistillate

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C. Hyphae of higher ascomycetes 3. Syncarpous

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D. Unisexual female flower 4. Dikaryotic

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(a) A:2, B:1, C:4, D:3 (b) A:1, B:2, C:4, D:2 (c) A:3, B:1, C:4, D:2 (d) A:4, B:3, C:1, D:2

44 ➤ 44. In majority of angiosperms [NEET - II, 2016]

(a) There are numerous antipodal cells (b) Reduction division occurs in the megaspore mother cells (c) A small central cell is present in the embryo sac (d) Egg has a filiform apparatus

45 ➤ 45. Pollination in water hyacinth and water lily is brought about by the agency of [NEET - II, 2016]

(a) Insects or wind (b) Birds (c) Bats (d) Water

46 ➤ 46. The ovule of an angiosperm is technically equivalent to [NEET - II, 2016]

(a) Megasporophyll (b) Megaspore mother cell (c) Megaspore (d) Megasporangium

47 ➤ 1. Among the terms listed below, the below options which are not technically correct names for a floral whorl are

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i. Androecium ii. Carpel iii. Corolla iv. Sepal

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

48 ➤ 2. Embryo sac is to ovule as ________ is to an anther.

(a) Stamen (b) Filament (c) Pollen grain (d) Androecium

49 ➤ 3. In a typical, complete, bisexual and hypogynous flower, the arrangement of floral whorls on the thalamus from the outermost to the innermost is

(a) Calyx, corolla, androecium and gynoecium (b) Calyx, corolla, gynoecium and androecium (c) Gynoecium, androecium, corolla and calyx (d) Androecium, gynoecium, corolla and calyx

50 ➤ 4. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is

(a) The plant is dioecious and bears only pistillate flowers (b) The plant is dioecious and bears both pistillate and staminate flowers (c) The plant is monoecious. (d) The plant is dioecious and bears only staminate flowers.

51 ➤ 5. The outermost and innermost wall layers of microsporangium in an anther are respectively

(a) Endothecium and tapetum (b) Epidermis and endodermis (c) Epidermis and middle layer (d) Epidermis and tapetum

52 ➤ 6. During microsporogenesis, meiosis occurs in

(a) Endothecium (b) Microspore mother cells (c) Microspore tetrads (d) Pollen grains

53 ➤ 7. From among the sets of terms given below, identify those that are associated with the gynoecium.

(a) Stigma, ovule, embryo sac, placenta (b) Thalamus, pistil, style, ovule (c) Ovule, ovary, embryo sac, tapetum (d) Ovule, stamen, ovary, embryo sac

54 ➤ 8. Starting from the innermost part, the correct sequence of parts in an ovule are

(a) Egg, nucellus, embryo sac, integument (b) Egg, embryo sac, nucellus, integument (c) Embryo sac, nucellus, integument, egg (d) Egg, integument, embryo sac, nucellus

55 ➤ 9. From the statements given below, choose the options that are true for a typical female gametophyte of a flowering plant.

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i. It is 8-nucleate and 7-celled at maturity.

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ii. It is free-nuclear during the development.

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iii. It is situated inside the integument but outside the nucellus.

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iv. It has an egg apparatus situated at the chalazal end.

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Choose the correct answer from the options given below:

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

56 ➤ 10. Autogamy can occur in a chasmogamous flower if

(a) Pollen matures before the maturity of ovule. (b) Ovules mature before the maturity of pollen. (c) Both pollen and ovules mature simultaneously. (d) Both anther and stigma are of equal lengths.

57 ➤ 11. Choose the correct statement from the following:

(a) Cleistogamous flowers always exhibit autogamy. (b) Chasmogamous flowers always exhibit geitonogamy. (c) Cleistogamous flowers exhibit both autogamy and geitonogamy. (d) Chasmogamous flowers never exhibit autogamy.

58 ➤ 12. A particular species of plant produces light; non-sticky pollen in large numbers and its stigma are long and feathery. These modifications facilitate pollination by

(a) Insects (b) Water (c) Wind (d) Animals

59 ➤ 13. From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

(a) Monoecious plant bearing unisexual flowers. (b) Dioecious plant bearing only male or female flowers. (c) Monoecious plant with bisexual flowers. (d) Dioecious plant with bisexual flowers.

60 ➤ 14. In a fertilized embryo sac, the haploid, diploid and triploid structures are

(a) Synergid, zygote and primary endosperm nucleus. (b) Synergid, antipodal and polar nuclei. (c) Antipodal, synergid and primary endosperm nucleus. (d) Synergid, polar nuclei and zygote.

61 ➤ 15. In an embryo sac, the cells that degenerate after fertilization are

(a) Synergid and primary endosperm nucleus cell (b) Synergid and antipodal (c) Antipodal and primary endosperm nucleus cell (d) Egg and antipodals

62 ➤ 16. While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant?

(a) Bagging of female flower (b) Dusting of pollen on stigma (c) Emasculation (d) Collection of pollen

63 ➤ 17. In the embryos of a typical dicot and a glass, the true homologous structures are

(a) Coleorhiza and coleoptiles (b) Coleoptile and scutellum (c) Cotylendons and scutellum (d) Hypocotyl and radical

64 ➤ 18. The phenomenon observed in some plants wherein the parts of the sexual apparatus used for forming embryos without fertilization is called

(a) Parthenocarpy (b) Apomixis (c) Vegetative propagation (d) Sexual reproduction

65 ➤ 19. In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be

(a) Haploid (b) Diploid (c) A few haploid and a few diploid (d) With varying ploidy

66 ➤ 20. The phenomenon wherein, the ovary develops into a fruit without fertilization is called

(a) Parthenocarpy (b) Apomixis (c) Asexual reproduction (d) Sexual reproduction

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