Sexual Reproduction in Flowering Plants (NEET/AIIMS Online Practice)

The arrangement of the nuclei in a normal embryo sac in the dicot plants is
1. 3 + 3 + 2
2. 2 + 4 + 2
3. 3+2 + 3
4. 2 + 3 + 3
Male gametophyte of angiosperms is shed as
1. four celled pollen grain
2. three celled pollen grain
3. microspore mother cell
4. anther
Total number of meiotic division required for forming 100 zygotes/100 grains of wheat is
1. 100
2. 75
3. 125
4. 50.
Perisperm is
1. remnant of endosperm
2. persistent nuccllus
3. peripheral part of endosperm
4. disintegrated secondary nucleus.
Development of an organism from female gamete/’ egg without involving fertilization is
1. adventitive embryony
2. polyembryony
3. parthenocarpy
4. parthenogenesis
Nucellar embryo is
1. amphimictic haploid
2. amphimictic diploid
3. apomictic haploid
4. apomictic diploid.
Generative cell was destroyed by laser but a normal pollen tube was still formed because
1. vegetative cell is not damaged.
2. contents of killed generative cell stimulate pollen growth
3. laser beam stimulates growth of pollen tube
4. the region of emergence of pollen tube is not harmed.
Which is correct?
1. gametes are invariably haploid
2. spores are invariably haploid
3. gametes are generally haploid
4. both spores and gametes are invariably haploid.
A diploid female plant and a tetraploid male plant are crossed. The policy of endosperm shall be
1. tetraploid
2. triploid
3. diploid
4. pentaploid.
Which ones produce androgenic haploids in anther cultures?
1. anther wall
2. tapetal layer of anther wall
3. connective tissue
4. young pollen grains.
Male gametophyte of angiosperms/monocots is
1. microsporangium
2. nucellus
3. microspore
4. stamen.
Female gametophyte of angiosperms is represented
1. ovule
2. megaspore mother cell
3. embryo sac
4. nucellus.
Sperm and egg nuclei fuse due to
1. base pairing of their DNA and RNA
2. formation of hydrogen bonds
3. mutual attraction due to differences in electrical charges
4. attraction of their protoplasts.
Entry of pollen tube through micropyle is
1. chalazogamy
2. mesogamy
3. porogamy
4. pseudogamy
Embryo sac occurs in
1. embryo
2. axis part of embryo
3. ovule
4. endosperm.
Which of the following pair have haploid structures?
1. nucellus and antipodal cells
2. antipodal cells and egg cell
3. antipodal cells and megaspore mother cell
4. nucellus and primary endosperm nucleus
Double fertilization is fusion of
1. two eggs
2. two eggs and polar nuclei with pollen nuclei
3. one male gamete with egg and other with synergid
4. one male gamete with egg and other with secondary nucleus.
Meiosis is best observed in dividing
1. cells of apical meristem
2. cells of lateral meristem
3. microspores and anther wall
4. microsporocytes
A population of genetically identical individuals, obtained from asexual reproduction is
1. callus
2. clone
3. deme
4. aggregate.
Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It is
1. orthotropous
2. anatropous
3. campylotropous
4. amphitropous.
Number of meiotic divisions required to produce 200/400 seeds of pea would be
1. 200/400
2. 400/800
3. 300/600
4. 250/500.
The polyembryony commonly occurs in
1. tomato
2. potato
3. Citrus
4. turmeric.
In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?
1. 75
2. 100
3. 25
4. 50.
The anthesis is a phenomenon, which refers to
1. development of anthers
2. opening of flower bud
3. stigma receptors
4. all of these.
If there are 4 cells in anthers, what will be the number of pollen grains?
1. 16
2. 12
3. 8
4. 4
Among the following, choose the terms that are technically does not indicate floral whorl

I. Sepal II. Corolla

III.Androecium IV. Carpel
1. I, II
2. III, IV
3. II,III
4. I,IV
Assertion & Reason type questions
[A]: Microspores or pollen grains are safely deposited in the fossils
[R]: Pollen grains have sporopollenin in their intine
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false
In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the outermost to the innermost is:-
1. Calyx, Corolla, Gynoecium, Androecium
2. Calyx, Corolla, Androecium, Gynoecium
3. Corolla,Calyx, Androecium,
  Gynoecium
4. Calyx, Androecium, Gynoecium, Corolla
The most probable cause for the situation in which a dicotyledonous plant does not produce fruits and seeds is:-
1. Plant is dioecious and produces only pistillate flowers
2. Plant is dioecious and produces staminate and pistillate flowers
3. Plant is dioecious and has staminate flowers
4. Plant has bisexual flowers.
Assertion & Reason type questions
[A]: Developed male gametophyte of angiosperm has 3 cells
[R]: In all angiosperms the male gametophyte has only two male gametes.
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false
The outermost and innermost layers of anther wall are

respectively
1. Epidermis, Endothecium
2. Middle layers , Endothecium
3. Tapetum, Epidermis
4. Epidermis, Tapetum
Starting from innermost part of ovule, the correct sequence of parts in a developed ovule is:-
1. egg, nucellus, embryosac, integument
2. nucellus, egg, embryosac,integument
3. egg, embryosac, nucellus, integument
4. nucellus, embryosac, egg, integument
Assertion & Reason type questions
[A]: Pollen of paddy can germinate even after two days
[R]: Microspores of some plants have viability of few months
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false
These cells of angiosperms are involved in meiosis
1. Cells that give rise microspores
2. Cells that give rise polar nuclei
3. cell involved in the formation of male
  
  gametes
4. Cell in which diploid secondary nucleus is present
From the below statements,choose the options that are true for a typical female gametophyte of flowering plant.
I. It is 8-nucleate and 7-celled at maturity
II. It is free nuclear during the development
III. It is situated inside the integument but outside the nucellus
IV. It has an egg apparatus situated at the chalazal end
1. I and IV
2. II, III
3. I and II
4. II, IV
Assertion & Reason type questions
[A]: Endothecium of anther wall helps in dehiscence of anther
[R]: It has Stomium
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false
Autogamy can occur in a chasmogamous flower if
1. Pollen matures before the maturity of ovule
2. Ovules mature before the maturity of pollen
3. Both pollen and ovule maturity is synchronous
4. Both anther and stigma and anther of same length.
Choose the correct statement from the following.
1. Cleistogamous flowers always exhibit autogamy
2. Chasmogamous flowers always exhibit geitonogamy
3. Cleistogamous flowers exhibit both autogamy and
  
  geitonogam
4. Chasmogamous flowers never exhibit
  
  autogamy
Match the following
List – I List – II
A) Generative cell I) Largest cell of embryosac
B) Male gametes II) Fertile cell of embryosac
C) Egg cell III) 3-celled pollen grain
D) Central cell IV) 2- celled pollen grain
1. IV III II I
2. V III II I
3. IV II III V
4. d) IV III I II
Match the following
List – I List – II
A) Ategmic ovule I) Monocots
B) Unitegmic ovule II) Annona
C) Apocarpous gynoecium III) Datura
D) Bitegmic ovules IV) Loranthus
------------------------ V) Pteris
1. IV III II I
2. V III II I
3. IV I II III
4. IV III V II
The character of Anatropous ovule is:-
1. Embryosac is curved
2. nucellus is curved
3. ovule body is curved
4. Ovule body and funiculus are parallel to each other
The distribution of cells in an embryosac is in the following pattern
1. 3, 2, 3
2. 3, 3, 1
3. 1, 3, 3
4. 3, 1, 3
For pollination the source of pollen is the same plant in
I. Autogamy
II. Cleistogamy
III.Xenogamy
IV.Geitonogamy
1. I, II, III, IV
2. II, III, IV
3. I, II, IV
4. II, III, I
Assertion & Reason type question
[A]: Grasses show wind pollination
[R]: Poaceae members have sticky pollen grains
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false
Endosperm is not formed in
1. Fabaceae
2. Compositae
3. Orchidaceae
4. Cucurbitaceae
The point at which the funiculus touches the ovule body is
1. Placenta
2. Micropyle
3. Hilum
4. Chalaza
Free nuclear divisions take place during
1. Formation of male gametophyte
2. Microsporogenisis
3. Meagasporogenesis
4. formation of female gametophyte
If a ovary has 50 ovules, the number of non-functional megaspores formed in the ovary is
1. 50
2. 200
3. 150
4. 100
Unisexual flowers are seen in
1. Castor
2. Maize
3. Cucurbits
4. All of these
Solanum shows
1. Protogyny
2. Protandry
3. heterostyly
4. herkogamy

Register with www.ibiokaare for study materials and higher level question.

Sexual Reproduction in Flowering Plants (NEET/AIIMS Online Practice)

MCQ