Sexual Reproduction in Flowering Plants (last 10 years) Flashcards by Unknown Unknown

Given below are two statements: (2022)

Statement I: Cleistogamous flowers are invariably autogamous

Statement II: Cleistogamy is disadvantageous as there is no chance for cross pollination

In the light of the above statements, choose the correct answer from the options given below.

a. Statement I is incorrect but Statement II is correct
b. Both Statement I and Statement II are correct
c. Both statement I and statement II are incorrect
d. Statement I is correct but Statement II is incorrect

b. Both Statement I and Statement II are correct

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Identify the incorrect statement related to Pollination: (2022)

a. Moths and butterflies are the most dominant pollinating agents among insects

b. Pollination by water is quite rare in flowering plants

c. Pollination by wind is more common amongst abiotic pollination

d. Flowers produce foul odours to attract flies and beetles to get pollinated

a. Moths and butterflies are the most dominant pollinating agents among insects

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A typical angiosperm embryo sac at maturity is: (2021)

a. 7- nucleate and 8-celled
b. 7- nucleate and 7-celled
c. 8- nucleate and 8- celled
d. 8-nucleate and 7- celled

d. 8-nucleate and 7- celled

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The term used for transfer of pollen grains from anthers of one plant to stigma of different plant which, during pollination, brings genetically different types of pollen grains
to stigma, is: (2021)

a. Geitonogamy
b. Chasmogamy
c. Cleistogamy
d. Xenogamy

d. Xenogamy

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In some members of which of the following pairs of families, pollen grains retain their viability for months after release ? (2021)

a. Poaceae ; Leguminosae
b. Poaceae ; Solanaceae
c. Rosaceae ; Leguminosae
d. Poaceae ; Rosaceae

c. Rosaceae ; Leguminosae

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The plant parts which consist of two generations one within the other: (2020)
Pollen grains inside the anther
Germinated pollen grain with two male gametes
Seed inside the fruit
Embryo sac inside the ovule

a. (1), (2) and (3)
b. (3) and (4)
c. (1) and (4)
d. (1) only

c. (1) and (4)

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In water hyacinth and water lily, pollination takes place by: (2020)

a. Water currents only
b. Wind and water
c. Insects and water
d. Insects or wind

d. Insects or wind

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The body of the ovule is fused within the funicle at: (2020)

a. Micropyle
b. Nucellus
c. Chalaza
d. Hilum

d. Hilum

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Which of the following is incorrect for wind-pollinated plants? (2020-Covid)

a. Many ovules in each ovary
b. Flowers are small and not brightly coloured
c. Pollen grains are light and non-sticky
d. Well exposed stamens and stigma

a. Many ovules in each ovary

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Which of the following has proved helpful in preserving pollen as fossils? (2018)

a. Pollenkitt
b. Cellulosic intine
c. Oil content
d. Sporopollenin

d. Sporopollenin

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Pollen grains can be stored for several years in liquid nitrogen having a temperature of: (2018)

a. –120°C
b. –80°C
c. –196°C
d. –160°C

c. –196°C

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Functional megaspore in an angiosperm develops into: (2017-Delhi)

a. Ovule
b. Endosperm
c. Embryo sac
d. Embryo

c. Embryo sac

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A dioecious flowering plant prevents both: (2017-Delhi)

a. Autogamy and xenogamy
b. Autogamy and geitonogamy
c. Geitonogamy and xenogamy
d. Cleistogamy and xenogamy

b. Autogamy and geitonogamy

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Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by: (2017-Delhi)

a. Water
b. Bee
c. Wind
d. Bat

c. Wind

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Attractants and rewards are required for: (2017-Delhi)

a. Anemophily
b. Entomophily
c. Hydrophily
d. Cleistogamy

b. Entomophily

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The ovule of an angiosperm is technically equivalent to: (2016 - II)

a. Megaspore mother cell
b. Megaspore
c. Megasporangium
d. Megasporophyll

c. Megasporangium

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Pollination in water hyacinth and water lily is brought about by the agency of: (2016 - II)

a. Birds
b. Bats
c. Water
d. Insects or wind

d. Insects or wind

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In majority of angiosperms: (2016 - II)

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

a. Reduction division occurs in the megaspore mother cell

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Which of the following statements is not correct? (2016 - I)

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.

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.

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Which one of the following statements is not true? (2016 - I)

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

a. Tapetum helps in the dehiscence of anther

Proximal end of the filament of stamen is attached to the:
(2016 - I)

a. Anther
b. Connective
c. Placenta
d. Thalamus or petal

d. Thalamus or petal

Which one of the following may require pollinators but is genetically similar to autogamy? (2015)

a. Apogamy
b. Cleistogamy
c. Geitonogamy
d. Xenogamy

c. Geitonogamy

Which of the following are important floral rewards to the animal pollinators? (2015)

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

d. Nectar and pollen grains

In angiosperms, microsporogenesis and megasporogenesis: (2015 Re)

a. Form gametes without further divisions
b. Involve meiosis
c. Occur in ovule
d. Occur in anther

b. Involve meiosis

25. Filiform apparatus is characteristic feature of: (2015 Re) a. Nucellar embryo b. Aleurone cell c. Synergids d. Generative cell

c. Synergids

26. Male gametophyte in angiosperms produces: (2015 Re) a. Single sperm and a vegetative cell b. Single sperm and two vegetative cells c. Three sperms d. Two sperms and a vegetative cell

d. Two sperms and a vegetative cell

27. Which one of the following statements is not true? (2015 Re) a. The flowers pollinated by flies and bats secrete foul odor to attract them b. Honey is made by bees by digesting pollen collected from flowers c. Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups d. Pollen grains of some plants cause severe allergies and bronchial afflictions in some people

b. Honey is made by bees by digesting pollen collected from flowers

28. Pollen tablets are available in the market for: (2014) a. Ex situ conservation b. In vitro fertilisation c. Breeding programmes d. Supplementing food

d. Supplementing food

29. Function of filiform apparatus is to: (2014) a. Guide the entry of pollen tube b. Recognise the suitable pollen at stigma c. Stimulate division of generative cell d. Produce nectar

a. Guide the entry of pollen tube

30. Geitonogamy involves: (2014) a. Fertilisation of a flower by the pollen from a flower of another plant belonging to a distant population b. Fertilisation of a flower by the pollen from another flower of the same plant c. Fertilisation of a flower by the pollen from the same flower d. Fertilisation of a flower by the pollen from a flower of another plant in the same population

b. Fertilisation of a flower by the pollen from another flower of the same plant

31. Which one of the following statements is correct? (2013) a. Tapetum nourishes the developing pollen b. Hard outer layer of pollen is called intine c. Sporogenous tissue is haploid d. Endothecium produces the microspores

a. Tapetum nourishes the developing pollen

32. Advantage of cleistogamy is: (2013) a. Vivipary b. Higher genetic variability c. More vigorous offspring d. No dependence on pollinators

d. No dependence on pollinators

33. Megasporangium is equivalent to: (2013) a. Ovule b. Embryo sac c. Fruit d. Nucellus

a. Ovule

34. Double fertilisation is: (2018) a. Fusion of two male gametes of a pollen tube with two different eggs b. Fusion of one male gamete with two polar nuclei c. Fusion of two male gametes with one egg d. Syngamy and triple fusion

d. Syngamy and triple fusion

35. Which part of the fruit, labelled in the given figure makes it a false fruit? (2022) insert an image a. D → Seed b. A → Mesocarp c. B → Endocarp d. C → Thalamus

d. C → Thalamus

36. In some plants thalamus contributes to fruit formation. Such fruits are termed as (2020-Covid) a. Aggregate fruits b. True fruits c. Parthenocarpic fruit d. False fruits

d. False fruits

37. Which one of the following statements regarding postfertilization development in flowering plants is incorrect? (2019) a. Ovary develops into fruit b. Zygote develops into embryo c. Central cell develops into endosperm d. Ovules develop into embryo sac

d. Ovules develop into embryo sac

38. Persistent nucellus in the seed is known as (2019) a. Chalaza b. Perisperm c. Hilum d. Tegmen

b. Perisperm

39. What is the fate of the male gametes discharged in the synergid? (2019) a. One fuses with egg other(s) degenerate(s) in the synergid. b. All fuse with the egg. c. One fuses with the egg, other(s) fuse(s) with synergid nucleus. d. One fuses with the egg and other fuses with central cell nuclei.

d. One fuses with the egg and other fuses with central cell nuclei.

40. The hollow foliar structure in a wheat embryo that encloses the shoot apex and a few leaf primordia is called: (2017-Gujarat) a. Coleoptile b. Coleorrhiza c. Epicotyl d. Hypocotyl

a. Coleoptile

41. Cotyledon of maize grain is called: (2016 - I) a. Plumule b. Coleorhiza c. Celeoptile d. Scutellum

d. Scutellum

42. The coconut water from tender coconut represents: (2016 - I) a. Endocarp b. Fleshy mesocarp c. Free nuclear proembryo d. Free nuclear endosperm

d. Free nuclear endosperm

43. The hilum is a scar on the: (2015) a. Fruit, where style was present b. Seed, where micropyle was present c. Seed, where funicle was attached d. Fruit, where it was attached to pedicel

c. Seed, where funicle was attached

44. The wheat grain has an embryo with one, large, shieldshaped cotyledon known as: (2015 Re) a. Coleorrhiza b. Scutellum c. Coleoptile d. Epiblast

b. Scutellum

45. Which one of the following fruits is parthenocarpic? (2015 Re) a. Apple b. Jackfruit c. Banana d. Brinjal

c. Banana

46. Coconut water from a tender coconut is: (2015 Re) a. Free nuclear endosperm b. Innermost layers of the seed coat c. Degenerated nucellus d. Immature embryo

a. Free nuclear endosperm

47. Non-Albuminous seed is produced in: (2014) a. Pea b. Maize c. Castor d. Wheat

a. Pea

48. Perisperm differs from endosperm in: (2013) a. Its formation by fusion of secondary nucleus with several sperms b. Being a haploid tissue c. Having no reserve food d. Being a diploid tissue

d. Being a diploid tissue

49. Seed formation without fertilization in flowering plants involves the process of: (2016 - I) a. Sporulation b. Budding c. Somatic hybridization d. Apomixis

d. Apomixis