Sexual reproduction in flower plants - Live session - NEET & AIIMS 2019 Contact Number: 8527521718Sexual reproduction in flower plants - Live session - NEET & AIIMS 2019 Contact Number: 8527521718Intine of pollen grains is composed of
1. Lipid and protein
2. Cellulose and pectin
3. Lignin and cutin
4. Pectin and lignin
At the time of pollination, how many cells are formed in the pollen grains
1. One
2. Two
3. Three
4. Four
The function of endothecium is
1. Nutritional
2. Mechanical support
3. Dehiscence
4. Protection
How many microspore mother cells will give rise to 25 microspores after reduction division
1. 512
2. 128
3. 64
4. 96
How many meiotic divisions are necessary to produce 100 pollen grains
1. 100
2. 25
3. 50
4. 20
In a pollen grain, larger nucleus is
1. Generative nucleus
2. Tube nucleus
3. Vegetative nucleus
4. None of these
In flowering plants, a mature 'male gametophyte' is derived from a 'pollen mother cell' by
1. Three mitotic divisions
2. One meiotic and Two mitotic divisions
3.Two mitotic divisions
4. A single meiotic division
Ubisch bodies found in tapetal cell help un formation of
1. Pollen kit and pollinia
2. Exine
3. Sporopollenin
4. Intine and pollen kit
Tapetum is a part of
1. Male gametophyte
2. Female gametophyte
3. Ovary wall
4. Anther wall
In angiosperm, all 4 microspores of tetrad are covered by a layer which is formed by
1. Callose
2. Cellulose
3. Sporopollenin
4. Pectocellulose
Generally how many megaspores take part in the development of female gametophyte
1. One
2. Two
3. Three
4. Four
In which type whole of the megaspore mother cells takes part in the formation of the female gametophyte
1. Monosporic 8 nucleate
2. Monosporic 4 nucleate
3. Bishopric
4. Tetrasporic
If the number of chromosomes in root cells is 14, what will be the number of chromosomes in synergies cells of an ovule of the parent
1. 7
2. 14
3. 21
4. Incomplete information
It the endosperm mother cell of an angiosperm plant has 24 chromosomes, the same in the MMC will be
1. 12
2. 48
3. 16
4. 24
Which of the following pairs of plant parts are both haploid?
1. Antipodal cells and egg cells
2. The nucellus and primary endosperm nucleus
3. Nucellus and antipodal cells
4. Antipodal cells and megaspore mother cells
The functional megaspore undergoes
1. 1 meiotic divisions to form mature embryo sac
2. 3 mitotic divisions to form mature embryo sac
3. 2 mitotic divisions to form mature embryo sac
4. 3 meiotic divisions to form mature embryo sac
Mature embryo sac contains or A normal angiosperm embryo sac at the final stage of development has
1. 4 cells
2. 3 cells
3. 7 cells
4. 8 cells
Egg apparatus of angiosperm consists of
1. One egg cell and two synergids
2. One egg cell 2 synergids 3 antipodals
3. 3 antipodals only
4. Secondary nucleus and egg cell
What is the direction of micropyle in the anatropous ovule
(1) Left
(2) Right
(3) Upward
(4) Inverted
Ovule with funiculus lying close to micropyle is known as
1. Anatropous
2. Campylotropous
3. Atropous
4. Cytokinin
Which one of the following is an example of cleistogamy
1. Sunflower
2. Vallisneria
3. Commelina
4. Calatropis
In Ficus (Peepal) pollination is affected by
(1) Air
(2) Water
(3) Insects
(4) Birds
In which type of flowers, stigma is rough and sticky
(1) Insect pollinated
(2) Wind pollinated
(3) Water pollinated
(4) All the above
Dichogamy which helps in cross-pollination is a floral mechanism in which
(1) Pollen sac and stigma are at different heights
(2) Anther and stigma mature at different times
(3) Structure of pollen sac and stigma functions as hurdles
(4) The pollen grain is unable to germinate on the stigma of the same flower
Which prevents self-pollination
(1) Self sterility
(2) Herkogamy
(3) Dichogamy
(4) All of the above
The pollination which occurs in one plant is
(1) Herkogamy
(2) Cleistogamy
(3) Dichogamy
(4) Dicliny
A close relation between flower and the pollinating agent is best exhibited by
(1) Cocos
(2) Salvia
(3) Yucca
(4) Avena
Which of the following type of gynoecium is associated with wind pollination
1. 
2. 
3. 
4. 
Double fertilization is a characteristic of
(1) Gymnosperms
(2) Bryophytes
(3) Angiosperms
(4) Pteridophytes
Fertilization of egg takes place inside
(1) Anther
(2) Stigma
(3) Pollen tube
(4) Embryo sac
Pollen tube at the time of entering embryo sac has
(1)Four gametes
(2) Three male gametes
(3) Two male gametes
(4) One gametic nucleus
A pollen tube grows down the style because
(1) It helps in fertilization
(2) It takes nutrients from the style
(3) Filiform apparatus of synergids attract the pollen tube
(4) Of chemical attraction
Pollen tube discharge its gametes in
1. Synergids
2. Antipodals
3. Central cell
4. None of these
Which of the following is not true for double fertilization
1. Discovered by Nawaschin
2. Male gamete and secondary nucleus fused to form Endosperm nucleus
3. Endosperm nucleus is diploid
4. Endosperm provide nutrition to embryo
Morphologically the white fluffy edible mass in maize is
1. seed coat
2. seed
3. endosperm
4. pericarp
Which one is an example of triploid tissue
1. Onion root
2. Fern prothallus
3. Maize and lily endosperm
4. None of the above
Milky water of green coconut is
1. Liquid nucellus
2. Liquid of female gametophyte
3. Liquid endosperm
4. Liquid embryo
Fusion product of polar nuclei and male gamete is
1. Triple fusion
2. Primary endosperm nucleus
3. Zygote
4. Secondary nucleus
The outermost layer of the endosperm of maize grain is called
1. Epidermis
2. Tunica
3. Aleurone
4. Pericarp
If the number of chromosomes in endosperms of a dicot plant is 36, the root cells will contain
1. 72 chromosomes
2. 28 chromosomes
3. 24 chromosomes
4. 48 chromosomes
The embryo in sunflower has
1. No cotyledon
2. One cotyledon
3. Two cotyledon
4. Many cotyledons
Presence of many embryos (Polyembryony) is a characteristic feature of
1. Citrus
2. Mango
3. Banana
4. None of these
In angiosperms, the oospore on development produces
1. Seed
2. Embryo
3. Protonema
4. Endosperm
The endosperm in angiosperms develops from
1. Micropylar polar nucleus
2. Chalazal polar nucleus
3. Secondary nucleus
4. Zygote
The endosperm of a gymnosperm is
1. Diploid
2. Tetraploid
3. Haploid
4. None of these
Bananas are seedless because they
1. reproduce asexually
2. Are triploid
3. Are sprayed with hormone
4. Are parthenocarpic
Formation of fruits without fertilization is known as or Ovary Fruit
1. Parthenocarpy
2. Parthenogenesis
3. Polyembryony
4. Polygamy
Which plant will lose its economic value, if its fruits are produced by induced parthenocarpy
1. Grape
2. Pomegranate
3. Orange
4. Banana
Parthenogenesis is a term of
1. Sexual reproduction
2. Asexual reproduction
3. Budding
4. regeneration
Seedless grapes are produced due to
1. Parthenocarpy
2. Crossing over
3. Parthenogenesis
4. None of these