The above diagram shows some stages in microgametogenesis. Identify A, Band C:
               A                               B                              C
(a) Symmetric spindle        Generative cell           Vegetative cell
(b) Symmetric spindle        Vegetative cell           Generative cell
(c) Asymmetric spindle       Vegetative cell           Generative cell
(d) Asymmetric spindle       Generative cell           Vegetative cell

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Which of the following statements is false?

  1. Pollen grains represents male gametophyte
  2. In angiosperms partially developed male gametophytes are pollinated
  3. Generative cell is siponogenous while vegetative cell is spermatogenous
  4. Formation and differentiation of pollen grains is called microsporogenesis
  5. Hay fever is a pollen allergy
  6. Pollen grains of some plants produce severe allergy and respiratory or bronchial diseases
  7. Pollen grains are poor in nutrients.

(a) I and VII          (b) III and VII       (c) IV and V          (d) VI and VII

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The viability of pollen grains depends upon:
(a) Prevailing temperature
(b) Prevailing humidity
(c) Genetic potentiality of the concerned species
(d) All of the above

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Which of the following has the least pollen viability?

(a) Cereals like wheat and rice           (b) Members of Rosaceae

(c) Members of Leguminoseae            (d) Members of Solanaceae

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Match the Column-I with Column-II:
    Column-I                                          Column-II
A. Funicle                                 I. Mass of cells within ovule with more food
B. Hilum                                  II. Basal part of ovule
C. Integument                        III. One or 2 protective layers of ovule
D. Chalaza                              IV. Region where body of ovule fuses with funicle
E. Nucellus                               V. Stalk of ovule
(a) A - I, B - II, C - III, D - IV, E - V           (b) A - V, B - IV, C - III, D - II, E - I
(c) A - IV, B - II, C - I, D - III, E - V           (d) A - I, B - III, C - V, D - II, E - IV

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Which of the following sequences of development of embryo sac / female gametophyte is correct?
(a) Nucellus → Megaspore → Embryo sac
(b) Nucellus → Megaspore mother cell → Megaspore → embryo sac
(c) Nucellus → Megasporangium → Megaspore → Embryo sac
(d) Nucellus → Megagametophyte → Megaspore → Embryo sac

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Identify A, B, C and D structures shown in above diagram of female gametophyte:

 

A

B

C

D

(a)

Synergid

Polar nuclei

Central cell

Antipodal cells

(b)

Antipodal cells

Polar nuclei

Central cell

Synergids

(c)

Antipodal cells

Polar nuclei

Megaspore mother cell

Synergids

(d)

Filiform apparatus

Polar nuclei

Central cell

Antipodal cell

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Geitonogamy is:
(a) Functionally cross pollination involving a pollinating agent
(b) Genetically it is similar to autogamy since the pollen grains come from the same plant
(c) Functionally and genetically autogamy
(d) Both (a) and (b) are correct

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Go through the following statements:

  1. Flowers are bisexual and homogamous maturing anther and stigma of a flower at the same time.
  2. Mechanical devices bringing anthers and stigma close together in a bisexual chasmogamous flower.
  3. Cleistogamy (bisexual flowers remain closed)
  4. Anther and stigma of an intersexual flower mature in bud condition.

The above contrivances favour:

(a) Allogamy                   (b) Autogamy        (c) Xenogamy       (d) Cross pollination

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Go through the following statements:

  1. Flowers are small. They are often packed in inflorescence
  2. Flowers are colourless, nectarless and odourless
  3. Well exposed stamens
  4. Pollen grains - produced in large number, light, non-sticky
  5. Flowers often have a single ovule in each ovary
  6. Stigma - large, often feathery.

The above contrivances favour:

(a) Self pollination                              (b) Anemophily

(c) Ornithophily                                  (d) Entemophily

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Difficulty Level: