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CBSE Questions for Class 12 Medical Biology Sexual Reproduction In Flowering Plants Quiz 2 - MCQExams.com

In a type of apomixis known as adventive embryony, embryos develop directly from the 
  • Nucellus or integuments
  • Synergids or antipodals in a embryo sac
  • Accessary embryo sacs in the ovule
  • Zygote
In monocots, male gametophyte is 
  • Microspore
  • Megaspore
  • Tetrad
  • Nucellus
Which one of the following is odd?
  • Micropyle
  • Embryo sac
  • Nucellus
  • Pollen grain
Assured seed set is possible even in absence of pollinators, when pollination is
  • Chasmogamous
  • Cleistogamous
  • Geitonogamous
  • Xenogamous
Which of the following statement about sporopollenin is false?
  • Exine is made up of sporopollenin.
  • Sporopollenin is one of the resistant organic materials.
  • Exine has apertures called as germ pores where sporopollenin is present.
  • Sporopollenin can withstand high temperatures and strong acids.
  • No enzyme that degrades sporopollenin is so far known.
In a pollen grain, larger nucleus is 
  • Generative nucleus
  • Tube nucleus
  • Vegetative nucleus
  • None of the above
Ubisch bodies found in tapetal cell helps in the formation of 
  • Pollenkitt and pollinia
  • Exine
  • Intine and pollenkitt
  • None of the above
Germpore is the region where the exine is
  • Thick
  • Uniform
  • Thick and uniform
  • Absent
Endogamy in plants is the term, where
  • Actual fusion never occur.
  • Gametes tend to fuse but fusion product never survives.
  • Pollination between two flowers on the same plant.
  • Such term is never known in fungi..
The pollen grain is 
  • An immatures male gametophyte.
  • A mature male gametophyte.
  • Partially developed male gametophyte.
  • Both (A) and (C)
When pollen grains of a flower pollinate the stigma of another flower of the same plant, it is called as 
  • Dichogamy
  • Herkogamy
  • Geitonogamy
  • Autogamy
Fig is pollinated by 
  • Wind
  • Self
  • Water
  • Insects
Which of the following is pollinated by water?
  • Viola
  • Yucca
  • Oxalis
  • Commelina
  • Zostera
Pollination by wind is called as 
  • Geitonogamy
  • Anemophily
  • Autogamy
  • Malacophily
What is pollination?
  • Transfer of pollen grain from anther to stigma.
  • Germination of pollen grain.
  • Growth of pollen tube in ovule.
  • Visits of insects in flower.
Pollination by slug and snails is called as 
  • Ornithophilous
  • Malacophilous
  • Anemophilous
  • Chiropterophilous
One advantage of cleistogamy is 
  • It leads to greater genetic diversity
  • Seed dispersal is more efficient and widespread
  • Seed set is not dependent on pollinators
  • Each visit of a pollinator results in transfer of hundreds of pollen grains
Which one of the following is an example of cleistogamy?
  • Sunflower
  • Vallisneria
  • Commelina
  • Calatropis
Match the following.
  List I List II 
 A Zoophily 1 Pollination by birds
 B Ornithophily 2 Pollination by insects
 C Entomophily 3 Pollination by bats
 D Chiropterophily 4 Pollination by animals
  • A-4, B-1, C-2, D-3
  • A-2, B-1, C-4, D-3
  • A-4, B-3, C-2, D-1
  • A-1, B-4, C-2, D-3
Unisexuality of flowers prevents
  • Geitonogamy, but not xenogamy
  • Autogamy and geitonogamy
  • Autogamy, but not geitonogamy
  • Both geitonogamy and xenogamy
In which of the following, pollination takes place by lever mechanism?
  • Salvia
  • Ficus
  • Antirhinum
  • Ocimum
The transfer of pollen grain from the stamen to the stigma of the same 
flower is 
  • Autogamy
  • Allogamy
  • Geitonogamy
  • Xerogamy
In which one of the following pollination is autogamous?
  • Cleistogamy
  • Geitonogamy
  • Xenogamy
  • Chasmogamy
Which of the following type of gynoecium is associated by wind pollination?
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  • b
  • a
  • c
  • d
Pollination characteristically occurs in 
  • Angiosperms and fungi
  • Angiosperms and Gymnosperms
  • Pteridophytes and Angiosperms
  • Bryophytes and Angiosperms
A close relation between flower and pollinating agent is best exhibited by 
  • Cocos
  • Salvia
  • Yucca
  • Avena
In Salvia, pollination takes place by 
  • Animals
  • Water
  • Air
  • Insects
When anthers and stigma mature at the same time, it is called as 
  • Protandry
  • Homogamy
  • Isogamy
  • Dichogamy
Wind pollinated flowers are 
  • Small, producing nectar and dry pollen
  • Small, brightly coloured, producing large number of pollen grains
  • Small, producing large number of dry pollen grains
  • Large producing abundant nectar and pollen
Wind pollination is common in
  • Orchids
  • Legumes
  • Lilies
  • Grasses
The cell that divides to form the gametic nuclei in angiosperms is 
  • Vegetative cell
  • Generative cell
  • Tube cell
  • Antheridial cell
If the number of chromosomes in endosperm of a dicot plant is 36, the root cells will contain 
  • 72 chromosomes
  • 28 chromosomes
  • 24 chromosomes
  • 48 chromosomes
Apomictic embryos in Citrus arise from 
  • Diploid egg
  • Synergids
  • Maternal sporophytic tissue in ovule
  • Antipodal cells
Which of the following is a non-endospermic monocot seed?
  • Plumbago
  • Castor
  • Linseed
  • Alisma
The best example of polyembryony is 
  • Cocos
  • Pea
  • Capsicum
  • Pinus
Nucellar embryo is an
  • Apomictic embryo.
  • Amphimictic haploid.
  • Adventitive embryony.
  • Amphimictic diploid.
Presence of many embryos (polyembryony) is a characteristic feature of
  • Citrus
  • Mango
  • Banana
  • All of the above
Dicot embryo consists of 
  • Radicle and plumule
  • Radicle, plumule, cotyledons and sometimes endosperm
  • Radicle, plumule, cotyledons and tegmen
  • Radicle, plumule, cotyledons, tegmen and testa
When vegetative cell forms embryo without fertilization, it is called as 
  • Apospory
  • Apogamy
  • Diploid polyembryony
  • Adventive polyembryony
Pollination by bat is called ______________.
  • Ornithophily
  • Chiropterophily
  • Malacophily
  • Anemophily
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Both Assertion and Reason are incorrect
When the gametophyte is not formed by spores but by any
other part of sporophyte, it is known as

  • Multispory
  • Polyspory
  • Apospory
  • Germination
The ferns in which the entire sporangium develops from a single superficial cell of the saprophyte are known as
  • Leptosporangiate
  • Eusporangiate
  • Unisporangiate
  • Mesosporangiate
If the haploid number of chromosomes in Pinus is 12, the
number in its endosperm cells will be
  • 12
  • 24
  • 36
  • 6
Hybridization involves
  • Removal of stamens
  • Removal of stigma
  • Male sterility
  • Female sterility
Which of the following plant product is the hardest 
  • Lignin
  • Cutin
  • Suberin
  • Sporopollenin
Match the names of branches of biology listed under column I with the field of study given under column II; choose the answer which gives the correct combination of the alphabets of the two columns

Column I                                    Column II

(Branch of biology)                    (Field of study)

A.Palynology                             p.     Silkworms

B.Oncology                               q.     Pollens and pollen grains

C.Phycology                              r.     Cancer

D.Sericulture                             s.     Algae
  • A=s,B=q,C=r,D=p
  • A=q,B=r, C=s,D=p
  • A=s,B=r,C=q,D=p
  • A=r,B=q,C=s,D=p
The most advanced type of inflorescence is
  • Corymb
  • Catkin
  • Spadix
  • Capitulum
When stamens are superior, the flower is
  • Hypogynous
  • Perigynous
  • Epigynous
  • None of the above
In some plants the style is shorter. But in some others, it is longer than the stamens. This condition is called as
  • Homogamy
  • Homostyly
  • Heterostyly
  • None of the above
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