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NEET • BIOLOGY • SEXUAL REPRODUCTION IN FLOWERING PLANTS
Sexual reproduction in flowering plants practice · Mixed difficulty
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61
Medium
61 of 179
Remembering
+4 | -1
Ovule integument gets transformed into
View answer and explanation
Correct option: C
Seed coat
Option C (Seed coat) is correct because the integuments of the ovule develop into the protective outer layer of the seed, known as the seed coat or testa.
62
Medium
62 of 179
Analyzing
+4 | -1
Which of the given pollination technique is different from others?
View answer and explanation
Correct option: B
Geitonogamy
Option B (Geitonogamy) is the correct answer because it involves the transfer of pollen grains from the anther to the stigma of another flower of the same plant, differing from the other self-pollination mechanisms.
63
Medium
63 of 179
Analyzing
+4 | -1
Find out the mismatch
View answer and explanation
Correct option: C
Part: Endosperm , Ploidy :
Option C (Endosperm , Ploidy : ) is the mismatch because endosperm is triploid (3n), not diploid (2n).
64
Easy
64 of 179
Remembering
+4 | -1
In flowering plants endosperms are
View answer and explanation
Correct option: D
Triploid
Option D (Triploid) is correct because the endosperm in flowering plants results from the fusion of a sperm nucleus with two polar nuclei, resulting in a triploid (3n) tissue.
65
Hard
65 of 179
Remembering
+4 | -1
Seed coat is not thin, membranous in
View answer and explanation
Correct option: D
coconut
Option D (coconut) is correct because coconut has a thick, fibrous seed coat (mesocarp), unlike the thin seed coats of groundnut, gram, and maize.
66
Easy
66 of 179
Remembering
+4 | -1
Vegetative fertilization is also called
View answer and explanation
Correct option: A
Triple fusion
Option A (Triple fusion) is correct because vegetative fertilization refers to the fusion of the second male gamete with the polar nuclei, which is also known as triple fusion.
67
Medium
67 of 179
Understanding
+4 | -1
Out of the following choose the post-fertilisation events
View answer and explanation
Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because endospermeogenesis (endosperm formation) and embryogenesis (embryo development) are the two main events that occur after fertilization.
68
Easy
68 of 179
Remembering
+4 | -1
The arrangement of the nuclei in a normal embryo sac in the dicot plants, is
View answer and explanation
Correct option: B
3+2+3
Option B (3+2+3) is correct because a typical dicot embryo sac has 3 antipodal cells, 2 polar nuclei in the central cell, and 3 cells in the egg apparatus (1 egg cell + 2 synergids).
69
Hard
69 of 179
Understanding
+4 | -1
Aleurone layer in the monocot seed helps in
View answer and explanation
Correct option: D
All the above
Option D (All the above) is correct because the aleurone layer is involved in embryo protection, utilization of stored foods, and storage of food in the endosperm.
70
Easy
70 of 179
Understanding
+4 | -1
Choose the mis –matched option.
View answer and explanation
Correct option: D
Birds – Adansonia – Ornithophily
Option A (Wind – Cannabis – Anemophily) is the mis-matched option because Cannabis is primarily insect-pollinated, not wind-pollinated.
71
Easy
71 of 179
Remembering
+4 | -1
8-nucleated embryo sac are
View answer and explanation
Correct option: A
Monosporic
Option D (Any of these) is correct because 8-nucleated embryo sacs can arise from monosporic, bisporic, or tetrasporic development, depending on the specific plant species and meiotic events.
72
Easy
72 of 179
Remembering
+4 | -1
The fusion of male and female pronuclei of the gametes is called
View answer and explanation
Correct option: C
Amphimixis
Option C (Amphimixis) is correct because it specifically refers to the fusion of male and female pronuclei during fertilization, leading to the formation of a diploid zygote.
73
Easy
73 of 179
Understanding
+4 | -1
Which is most crucial for seed storage?
View answer and explanation
Correct option: A
Dehydration and dormancy
Option A (Dehydration and dormancy) is correct because these conditions minimize metabolic activity and prevent premature germination, crucial for long-term seed storage.
74
Medium
74 of 179
Understanding
+4 | -1
Double fertilization is fusion of
View answer and explanation
Correct option: D
One male gamete with egg and other with secondary nucleus
The correct answer is D (One male gamete with egg and other with secondary nucleus) because double fertilization involves one sperm fusing with the egg to form the zygote and the other sperm fusing with the secondary nucleus to form the endosperm.
75
Easy
75 of 179
Remembering
+4 | -1
Tallest flower is Amorphophallus. It is
View answer and explanation
Correct option: A
TRUE
Option A (TRUE) is correct because Amorphophallus (Titan Arum) is known for having the tallest unbranched inflorescence, making it the tallest flower.
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76
Medium
76 of 179
Understanding
+4 | -1
Seed is
View answer and explanation
Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because a seed is a ripened ovule and contains a plant part with two generations (the sporophyte embryo and the gametophyte tissue).
77
Medium
77 of 179
Remembering
+4 | -1
Zygote is always
View answer and explanation
Correct option: B
Diploid
Option B (Diploid) is correct because a zygote is formed by the fusion of two haploid gametes, resulting in a diploid cell.
78
Hard
78 of 179
Analyzing
+4 | -1
Which of the following statement(s) is/are false?
(i) Pollen grains represent immature male gametophyte.etophyte.
(ii) In angiosperms partially developed male gametophytes are pollinated.
(iii) Generative cell is siponogenous while vegetative cell is spermatogenous.
(iv) Formation and differentiation of pollen grains is called microsporogenesis.
(v) Pollen grains of some plants produce severe allergy and respiratory or bronchial diseases.
(vi) Pollen grains are poor in nutrients.
(i) Pollen grains represent immature male gametophyte.etophyte.
(ii) In angiosperms partially developed male gametophytes are pollinated.
(iii) Generative cell is siponogenous while vegetative cell is spermatogenous.
(iv) Formation and differentiation of pollen grains is called microsporogenesis.
(v) Pollen grains of some plants produce severe allergy and respiratory or bronchial diseases.
(vi) Pollen grains are poor in nutrients.
View answer and explanation
Correct option: B
(iii) and (vi)
Option B ((iii) and (vi)) is correct because the generative cell is spermatogenous (forms sperm), the vegetative cell is siphonogenous (forms pollen tube), and pollen grains are rich in nutrients.
79
Medium
79 of 179
Remembering
+4 | -1
Pollen grains can cause
View answer and explanation
Correct option: D
All of these
Option D (All of these) is correct because pollen grains can cause bronchial afflictions, asthma, and bronchitis due to their allergenic properties.
80
Easy
80 of 179
Analyzing
+4 | -1
Find the incorrect statement(s)
(a) Vallisneria and Hydrilla grow in fresh water
(b) Water hyacinth is water pollinated
(c) In water lily, type of pollination is anemophily and entomophily
(d) In all of water pollinated species pollens are protected from wetting by mucilagenous covering
(a) Vallisneria and Hydrilla grow in fresh water
(b) Water hyacinth is water pollinated
(c) In water lily, type of pollination is anemophily and entomophily
(d) In all of water pollinated species pollens are protected from wetting by mucilagenous covering
View answer and explanation
Correct option: C
b, d
Option C (b, d) is correct because Water hyacinth is insect or wind pollinated, not water pollinated, and not all water-pollinated species have mucilaginous coverings to protect pollen.
81
Medium
81 of 179
Application
+4 | -1
A plant has 24 chromosomes in microspore mother cell the number of chromosomes in its endosperm will be.
View answer and explanation
Correct option: A
36
Option A (36) is correct because the endosperm is triploid (3n), and the microspore mother cell is diploid (2n). Therefore, n = 12, and 3n = 36.
82
Medium
82 of 179
Remembering
+4 | -1
A typical angiosperm anther is
View answer and explanation
Correct option: D
Bilobed and tetrasporangiate
Option D (Bilobed and tetrasporangiate) is correct because a typical angiosperm anther is bilobed, with each lobe containing two microsporangia, making it tetrasporangiate.
83
Hard
83 of 179
Understanding
+4 | -1
The number of chromosomes in radicle is 16. What will be number of chromosomes in pollen tube nucleus, antipodals, secondary nucleus and endosperm respectively?
View answer and explanation
Correct option: A
8, 8, 16, 24
Option A (8, 8, 16, 24) is correct because pollen tube nucleus and antipodals are haploid (n), secondary nucleus is diploid (2n), and endosperm is triploid (3n).
84
Medium
84 of 179
Application
+4 | -1
There are 10 flowers in one individual plant of crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from that plant?
View answer and explanation
Correct option: D
48000
Option C (24000) is correct because each microspore mother cell produces 4 pollen grains, and the calculation is 10 flowers * number of stamens * 30 microspore mother cells * 4 pollen grains.
85
Medium
85 of 179
Remembering
+4 | -1
Double fertilization occurs among
View answer and explanation
Correct option: C
Angiosperms
Option C (Angiosperms) is correct because double fertilization is a unique characteristic of angiosperms.
86
Medium
86 of 179
Understanding
+4 | -1
Identify the wrong statements regarding post-fertilization development.
View answer and explanation
Correct option: B
The outer integument of ovule develops into tegmen
Option B (The outer integument of ovule develops into tegmen) is wrong because the outer integument develops into the testa, while the inner integument develops into the tegmen.
87
Medium
87 of 179
Application
+4 | -1
Genotype of endosperm is ZZA, find out the genotype of male and female plant respectively
View answer and explanation
Correct option: C
AA, ZZ
Option A (ZZ, AA) is correct because the endosperm is formed by the fusion of two polar nuclei (AA) and one sperm (Z), resulting in ZZA.
88
Easy
88 of 179
Remembering
+4 | -1
The number of female nuclei involved in double fertilization is
View answer and explanation
Correct option: B
3
Option B (3) is correct because double fertilization involves the egg cell and two polar nuclei, totaling three female nuclei.
89
Hard
89 of 179
Application
+4 | -1
In the formation of 50 zygotes in a tobacco plant the minimum number of meiosis involved will be.
View answer and explanation
Correct option: B
63
Option B (63) is correct because 50 meiotic divisions are required for 50 eggs, and 13 meiotic divisions are required for 50 pollen grains (since one meiosis produces 4 pollen grains).
90
Easy
90 of 179
Remembering
+4 | -1
Egg apparatus of embryo sac has
View answer and explanation
Correct option: D
One egg cell + two synergids
Option D (One egg cell + two synergids) is correct because the egg apparatus in the embryo sac is composed of one egg cell and two synergid cells.
Revision notes and key takeaways
Review SEXUAL REPRODUCTION IN FLOWERING PLANTS in your textbook or class notes, then use this set to check your understanding.
Showing 61-90 of 179 questions