CHAPTER 2 Sexual Reproduction in Flowering Plants

Sexual Reproduction in Flowering Plants

1. A typical angiosperm anther consists of
(a) Only one microsporangium
(b) Two microsporangia
(c) Three microsporangia
(d) Four microsporangia

2. What is the ploidy of the cells of the microspore tetrad?
(a) Haploid
(b) Diploid
(c)Triploid
(c) Polyploid

3. Tapetum is
(a) Nutritive tissue
(b) Protective tissue
(c) Sporogeneous tissue
(d) External layer of microsporangium

4. Germ pores are present on
(a) Intine
(b) Exine
(c) Vegetative cell
(d) Generative cell

5. Pollen allergy is caused by
(a) Pistia
(b) Mirabilis
(c) Myosotis
(d) Parthenium

6. Translator apparatus is found in
(a) Calotropis
(b) Triticum
(c) Allium
(d) Citrus

7. Intine is made up of
(a) Cellulose
(b) Pectocellulose
(c) Sporopollenin
(d) Silica and cellulose

8. Pollen viability of rice and wheat plant is
(a) 45 seconds
(b) 1.5  hours
(c) 24 hours
(d) Several months

9. In flowering plants, pollination takes place at
(a) 1 celled stage
(b) 2 celled stage
(c) 3 celled stage
(d) 4 celled stage

10. Pollen tube was first observed by
(a) Amici
(b) Correns
(c) Dickinson
(d) Strasburger

11. Pollen tube carries
(a) Female gametes
(b) Motile gametes
(c) Non-motile male gametes
(d) Male & female gametes

12. Suspensor of dicot embryo is
(a) Absent
(b) One celled
(c) 6-10 celled
(d) 10-20 celled

13. Perisperm is
(a) Remnant of nucellus
(b) Degenerated synergids
(c) Peripheral part of endosperm
(d) Degenerated secondary nucleus

14. Epiblast is
(a) Embryo of grass
(b) Covering of radicle
(c) Covering of plumule
(d) Reduced cotyledon of grass embryo

15. Coconut milk is
(a) Solid endosperm
(b) Liquid endosperm
(c) Helobial endosperm
(d) Degenerated cellular endosperm

16. Most common type of endosperm is
(a) Nuclear
(b) Cellular
(c) Helobial
(d) Both (b) & (c)

17. Development of sporophyte without gametic  fusion  is known as
(a) Apomixes
(b) Apospory
(c) Apogamy
(d) Agamospermy

18. A stamen is
(a) Microsporophyll
(b) Megasporophyll
(c) Microsporangium
(d) Megasporangium

19. Development of anther in angiosperms is
(a) Simple
(b) Gradate
(c) Eusporangiate
(d) Leptosporangiate

20. The tapetal cells of anther shows
(a) Haploidy
(b) Diploidy
(c) Triploidy
(d) Polyploidy

21. Glandular type of tapetum secretes
(a) Pollenkit
(b) Sporopollenin
(c) Compatibility proteins
(d) All of the above

22. Exine is composed of
(a) Lignin
(b) Pollen kit
(c) α-cellulose
(d) Sporopollenin

23. The number of germ pores in dicots and monocots pollen grains are
(a) 1,3
(b) 3,1
(c) 2,1
(d) 3,2

24. Germination of pollen grain is due to
(a) Ca, B
(b) Mn, Ca
(c) N, S
(d) Fe, Ca

25. Number of male gametes in one pollen tube is
(a) 1
(b) 2
(c) 3
(d) 4

26. Chasmogamy is pollination in
(a) Bud condition
(b) Open flowers
(c) Closed flowers
(d) Unrelated flowers

27. In geitonogamy, pollen grains are transferred to
(a) Genetically similar flower
(b) Genetically different flower
(c) Stigma of the same flower
(d) Stigma of another flower of a different plant

28. Which of the following is not a contrivance for self pollination?
(a) Homogamy
(b) Dichogamy
(c) Cleistogamy
(d) Bud pollination

29. Bats are pollinator of
(a) Butea
(b) Sunflower
(c) Adansonia
(d) Callistemon

30. Dioecious condition and epihydrophily is found in\
(a) Salvia
(b) Zostera
(c) Coconut
(d) Vallisneria

31. Types of ovules in angiosperms are
(a) 3
(b) 6
(c) 8
(d) 11

32. Double fertilization was discovered by
(a) Amici
(b) Nawaschin
(c) Strasberger
(d) P. Maheshwari

33. How many megaspore mother cells produce 100 eggs during meiosis?
(a) 1
(b) 25
(c) 50
(d) 100

34. Mother cell of endosperm is
(a) Egg
(b) Synergid
(c) Antipodal
(d) Central cell

35. Fusion of 2^nd male gamete with secondary nucleus is called
(a) Syngamy
(b) Triple fusion
(c) Double fertilization
(d) Triple fertilization

36. Ovules are also called
(a) Seeds
(b) Nucellus
(c) Megasporophyll
(d) Integumented megasporangia

37. Fibrous bands present in endothecium of anther wall is made up of
(a) Lignin
(b) Pectin
(c) α-glucsoe
(d) sporopollenin

38. The two cells at which pollen grains are discharged are:
(a) Smaller  vegetative cell and larger body cell
(b) Larger vegetative cell and smaller body cell
(c) Smaller generative cell and larger vegetative cell
(d) Larger generative cell and smaller vegetative cell

39. When pollen grains of a flower fall on stigma of another flower of the same plant it is
(a) Genetically self-pollination
(b) Ecologically cross pollination
(c) Both
(d) None

40. The chemical complex controlling the chemotropic movement of pollen tube in style is
(a) K⁺, organic acids
(b) Ca, B, inositol sugar complex
(c) Lignin, amino acid, potassium salts
(d) Ca, K⁺, Sugar complex

41. Germination of pollen grain on the stigma is called
(a) In vivo germination
(b) In-vitro germination
(c) In situ germination
(d) Ex-situ germination

42. Pollen tube was first observed by
(a) Amici
(b) Nawaschin
(c) Camerarius
(d) Maheshwari

43. Multiple embryos are produced by
(a) Cleavage of single zygote
(b) Fertilization of synergids or antipodal cells by sperms
(c) Development of cells of nucellus or integument into embryo
(d) All of the above

44. Sporoderm is
(a) Spore wall
(b) Sperm wall
(c) Anther wall
(d) Integument

45. Spermoderm is
(a) Sperm wall
(b) Seed coat
(c) Anther wall
(d) Integument

46. Ploidy level of angiospermic endosperm is
(a) N
(b) 2n
(c) 3n
(d) 4n

47. The viability of seeds is tested by
(a) TTC
(b) Sucrose
(c) Boric acid
(d) Liquid nitrogen

48. During germination the entry of oxygen and water into seed is facilitated by
(a) Testa
(b) Micropyle
(c) Seed coat
(d) Integument

49. Non-recurrent agamospermy is seen in
(a) Pear
(b) Apple
(c) Grapes
(d) Banana

50. Remains of 2^nd cotyledons occurring in grasses is called
(a) Epiblast
(b) Epicotyl
(c) Hypocotyl
(d) Scutellum

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