Sexual Reproduction in Flowering Plants - Zoom Session

- 12 July 2021 Contact Number: 9667591930 / 8527521718

1. 6.
Most abundant/common type of pollen tetrad is Which of the given is not related to wind pollination?
_________ and it is formed due to _________
cytokinesis. 1. Flowers are nectraless, odourless and colourless

1. Tetrahedral, successive 2. Versatile statements in grasses

2. Tetrahedral, simultaneous 3. Dry, unbranched short stigma

3. Isobilateral, successive 4. Winged pollens in Pinus

4. Isobilateral, simultaneous 7.

2. Find out the correct order (w.r.t. development of male

gametophyte)
Double fertilization is different from single fertilization
because of the presence of
1. Syngamy
2. Seed
3. Triple fusion
4. Megaspore and micropore
3.
Pollen grain in angiosperms
1. Is derived from a megaspore
2. Remains permanently embedded in the nucellus 1. D → A → C → B '
3. Is generally shed in 2-celled stage
2. D → B → A → C
4. Is 7-celled and 8 nucleated structure
3. D → C → B → A
4.
The micropylar end of Polygonum type of embryosac has 4. A → B → C → D
the following structural cells, except 8.
1. Definitive nucleus In a transverse section, a typical microsporangium of
2. Synergid flowering plants is generally surrounded by four wall
layers - the epidermis, endothecium, middle layers and
3. Egg cell the tapetum. Cells of the tapetum
4. Oosphere 1. Possess dense cytoplasm and generally have more than
one nucleus
5.
2. Nourish the developing microspores as well as
Seeds offer which of the following advantages to
megaspores
angiosperms?
3. Help in dehiscence of anther
1. Shows better dispersal strategies
4. Perform the function of anther
2. Dormancy of seed allows it to be utilized as food
source throughout the year 9.
3. Forms the basis of agriculture Egg apparatus consists of
4. Asexual seed development allows the hybrid seed to 1. Central cell + egg cell
maintain their superior characters
2. Synergids + polar nuclei + egg cell
3. Synergids + oosphere
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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

10. 15.
A typical angiospermic anther Mark the incorrect one
1. Is monothecous and bisporangiate 1. Pollen consumption has been claimed to increase the
performance of athletes and race horses
2. Shows the two pollen sacs in an anther lobe which are
separated internally by strip of fertile tissue 2. Viability of pollen grain depends upon temperature,
not humidity
3. Dithecous and tetrasporangiate
3. Pollen grains of a large number of species can be
4. Is a mass of homogeneous meristematic cells in mature stored in liquid nitrogen for years
stage
4. pollen grains of rice and wheat lose viability within the
11. half an hour
What is the most common shape and size of pollen grain 16.
in angiosperms plants?
Vegetative cell of angiospermic pollen grain is
1. Spindle-shaped, 25-50 μm characterised by
2. Spherical, 2-5 μm 1. Less amount of food reserve and large size
3. Spherical, 25-50 μm 2. Small size and spindle shaped nucleus
4. Spindle-shaped, 2-5 μm 3. Haploid ploidy level and less amount of food reserve
12. 4. Abundant food reserve and irregularly shaped nucleus
In flowering plants, endosperm
1. Is pre-fertilizing tissue 17.
2. Development rarely involves free nuclear divisions During the development of most common type of
3. Development precedes embryo development endosperm in flowering plants

4. Is triploid tissue always 1. PEN divides meiotically without wall formation

13. 2. Each karyokinesis is followed by wall formation

The outer layer of pollen grain in non-archegoniate 3. Wall formation begins after achieving a multinucleate
spermatophytes is made up of sporopollenin. This condition
chemical 4. PEN divides mitotically and results into haploid nuclei
1. Is one of the most resistant inorganic material
2. Is temperature and enzyme resistant 18.
3. Is resistant for strong acids, not for alkali During the development of typical embryo sac from the
4. Is resistant for strong alkali, not for acids functional megaspore
1. The free nuclear division takes places

14. 2. Cytokinesis is present after each karyokinesis

What is the possible advantage if hybrids are made into 3. Nuclear divisions are followed immediately by cell
apomicts? wall formation

1. Segregation of characters in the hybrid progeny 4. Cell walls are laid down after the 4-nucleated stage

2. Farmers can keep on using the hybrid seeds to raise

new crop in first year only
3. Absence of segregation in the hybrid progeny
4. More than one option is correct
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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

19. 24.
In a typical dicotyledonous embryo, the cylindrical Flowers of aquatic plants like water hyacinth and water
portion below the level of cotyledons is _________ that lily
terminates at its lower and in the ____________
1. Are not pollinated by water
1. Epicotyl, plumule
2. Emerge above the level of water for epihydrophilly
2. Epicotyl, radicle
3. Reach the surface of the water for hypohydrophilly
3. Hypocotyl, radicle
4. Have exine in their pollen grains
4. Hypocotyl, plumule
25.
20.
The lower end of the embryonal axis in maize has the
The process involving the transfer of pollen grains from radicle and root cap enclosed in
the anther to the stigma of another flower of the same
plant is 1. An extension of scutellum

1. Genetically as well as functionally self-pollination 2. A structure called coleoptile

2. Functionally cross-pollination and genetically self- 3. A differentiated sheath

pollination 4. A structure called coleorrhiza
3. Functionally as well as genetically cross-pollination 26.
4. Genetically cross-pollination and functionally self- Mark the incorrect statement
pollination
1. Hybrid seeds have to be produced every year
21.
2. Production of hybrid seeds is costly
Group of plants having chasmogamous as well as
cleistogamous flowers are 3. If the seeds collected from hybrids are sown, the
progeny do not maintain hybrid characters
1. Arachis, Gloriosa, Salvia
4. Cultivation of hybrids has decreased productivity
2. Calotropis, Nicotiana, Ficus
27.
3. Viola, Oxalis, Commelina
Male and female plants are not separate in case of
4. Vallisneria, Mirabilis, Magnolia
1. Papaya and date-palm
22.
2. Mulberry and papaya
Pollination by water is
3. Date-palm and mulberry
1. Limited to about 30 families of dicots
4. Castor and maize
2. Very common in flowering plants
28.
3. More common in monocots than dicots
Vegetative cell in a pollen grain
4. More common abiotic method of pollination
1. Floats in the cytoplasm of the generative cell
23.
2. Is small and spindle-shaped
Wind pollinated flowers often
3. Is larger than generative cell but lacks reserve food
1. Have a single ovule in each ovary
4. Has a large irregularly shaped nucleus
2. Produces light and sticky pollen grains
3. Have sticky and inserted stigma
4. Produces heavy and non-sticky pollen grains

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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

29. 33.
In Polygonum type of embryo sac, polar nuclei Read the following statements carefully and select the
correct
1. Are haploid
a. Tapetum cells possess dense cytoplasm and generally
2. Can serve as a precursor of PEN have more than one nucleus
3. Occur in the large central cell b. Sporopollenin is absent in the areas called germ pore
4. More than one option is correct c. The generative cell is small, spindle-shaped with a
30. irregularly shaped nuclei

Endosperm development precedes embryo development d. The spindle of first mitosis in pollen is asymmetric
because 1. a, b, c, & d
1. It is a product of triple fusiony 2. a, b, & c
2. It provides nutrition to developing embryo 3. a, c, & d
3. It is larger than embryo 4. a, b, & d
4. Its development mostly occurs by free nuclear division 34.
in PEN
Endosperm persists in the mature seeds of
31.
1. Pea
Viability of seeds
2. Groundnut
1. May be lost within a few months
3. Gram
2. Is 1000 years in Lupinus arcticus
4. Maize
3. Recorded in Phoenix is 10000 yeats
35.
4. Can be tested by 1% solution of TTC
Functional megaspore in Polygonum divides by free
32. nuclear mitotic divisions and develops into 8 nucleated
Pollen grains lose viability within 30 minutes of their and 7 celled female gametophytes. The largest cell of this
release in the members of family gametophyte is

1. Rosaceae 1. Antipodal cell

2. Solanaceae 2. Central cell

3. Poaceae 3. Synergid cell

4. Leguminosae 4. Egg cell

36.
Transfer of pollen grains from the anther of one flower to
the stigma of another flower of the same plant is called as
1. Xenogamy
2. Autogamy
3. Geitonogamy
4. Cleistogamy

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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

37. 40.
Removal of anther from ______ flower _________- The figure given below shows fertilised embryo sac of
maturation of anther is called emasculation the flowering plants. Which one set of two parts out of (a
- e) have been correctly identified?
1. Unisexual, after
2. Bisexual, before
3. Unisexual, before
4. Bisexual, after
38.
Find the incorrect statements w.r.t. pollen grain in
angiosperms plants
a. Germ pores are areas in pollen wall where intine and
sporopollenin are absent 1. (a) - Nucleolus:
b. The vegetative cell is bigger, has abundant food (c) - Primary endosperm nucleus
reserves, and a large irregularly shaped nucleus
2. (e) - Degenerating antipodal cells and zygote;
c. The fascinating array of patterns and designs are
exhibited by exine wall (d) - Degenerating synergids
d. In over 60 percent of angiosperms, pollen grains are 3. (b) - Zygote;
shed at 3-celled stage
(a) - Central cell
1. c and d
4. (c) - Primary endosperm cell;
2. a and d
(e) - Degenerating synergids
3. b and d
41.
4. a and c
Which one of the following statements is not true?
39.
1. Filiform apparatus present at the chalazal end of the
Most of the aquatic and land plants are pollinated by synergies guides the entry of pollen tube
1. Insects or wind 2. Pollen - pistil interaction is a dynamic process
involving pollen recognition followed by promotion or
2. Water and insects respectively inhibition of the pollen
3. Abiotic factors only 3. Majority of insect-pollinated flowers are large,
4. Water and wind respectively colourful, fragrant and rich in nectar
4. Apomixis is a form of asexual reproduction that
mimics sexual reproduction
42.
During microsporogenesis
1. Microspore tetrad is developed by meiosis in
sporogenous tissue
2. Pollen grains are developed by mitosis in sporogenous
tissue
3. Microspore develops into the male gametophyte
4. Male gametes are produced by pollen grain

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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

43. 48.
In pollen banks, pollens are stored at Functionally cross-pollination but genetically similar to
autogamy is
1. −196°C of liquid nitrogen
1. Xenogamy
2. +20°C of liquid nitrogen
2. Geitonogamy
3. 0°C of liquid nitrogen
3. Chasmogamy
4. 4°C of liquid nitrogen
4. Cleistogamy
44.
49.
Mark the mis-matched pair
Examine the figure of microsporangium and select the
1. Orchid - Tiny seeds part correctly matched with its feature or function.
2. Hydrophily - Common in dicots
3. Pollen grain - 25 to 50 μm in diameter
4. Parthenium - Pollen allergy
45.
The stalk by which an ovule is attached to the placenta is
called
1. Funicle
2. Hilum
3. Chalaza
4. Micropyle 1. Part (D): Endothecium - Development of sporoderm
46. 2. Part (A): Innermost wall layer - Dense cytoplasm in
Choose the correct match w.r.t. angiosperm cells

1. Microsporanigum - ovule; Megasporangium - female 3. Part (C): Middle layers - Nutrition to megaspores
gametophyte 4. Part (B): Tapetum - Sporic meiosis
2. Megasporangium - ovule; Embryo sac - female 50.
gametophyte
At the lower end, the embryonal axis in grasses has the
3. Megasporangium - female gametophyte; Embryo sac - radical and root cap enclosed in/by
ovule
1. Coleoptile
4. Nucellus - male gametophyte; Megasporangium -
ovule 2. Hypocotyl

47. 3. An undifferentiated sheath

Formation of embryo sac from a single megaspore nuclei 4. Epicotyl

is termed as
1. Bishopric development Fill OMR Sheet
2. Monosporic development
3. Tetrasporic development
4. Polysporic development

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 Sexual Reproduction in Flowering Plants - Zoom Session
- 12 July 2021 Contact Number: 9667591930 / 8527521718

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