CBSE Questions for Class 12 Medical Biology Sexual Reproduction In Flowering Plants Quiz 4 - MCQExams.com

Another term for cross-pollination is .........
  • Allogamy
  • Xenogamy
  • Autogamy
  • Both (A) and (B)
Germ pores can be traced in ................
  • Pollen grain
  • Seed
  • Testa
  • Ovule
In a type of apomixis known as adventive embryony, embryos develop directly from the ...........
  • Nucellus or integuments
  • Synergids or antipodals in an embryo sac
  • Accessory embryo sacs in ovule
  • Zygote
A botanist collected some fruits with hook-like spines and when the seeds of the same have been germinated they turned out to be asteraceous taxa, bearing asepalous and wind pollinated flowers. The fruit he collected were of .............
  • Xanthium strumarium
  • Lactuca sativa
  • Carthamus tinctorius
  • None of the above
Endosperm may completely be consumed by the developing embryo before in maturation in
  • Oat
  • Wheat
  • Barley
  • Pea and groundnut
Caruncle of albuminous dicot seed is derived from _________.
  • Cotyledon
  • Embryo
  • Integument
  • Peduncle
When the gametophyte is not formed by spores but by another part of sporophyte, it is known as ...............
  • Multispory
  • Polyspory
  • Apospory
  • Germination
Which of the following is haploid in gymnosperm?
  • Pollen grain, megaspore, root
  • Pollen grain, megaspore, nuclues
  • Megaspore mother cell, root, leaf
  • Endosperm, Pollen grain, Megaspore
Apomixis term was given by .....................
  • Focke
  • Swingle
  • Winkler
  • Navashin
Pollen grains are able to withstand extremes of temperature and desiccation because their exine is composed of 
  • Cutin
  • Suberin
  • Sporopollenin
  • Callose
What is studied under palynology?
  • Morphology of pollengrain
  • Germination of pollengrain
  • Development of pollengrain
  • Storage and arrangement of pollengrain
In a cereal gain the single cotyledon of embryo is represented by ................
  • Coleoptile
  • Coleorhize
  • Scutellum
  • Prophyll
Pollination by snail and slug is known as
  • Ornithophilous
  • Chiropterophilous
  • Entomophilous
  • Malacophilous
Apomixis is 
  • Fusion of gametes.
  • Double fertilization of plants.
  • Union of male and female pronuclei.
  • Failure of fusion of gametes resulting in parthenogenesis.
Diptera flies are trapped for pollination by the flowers of 
  • Rafflesia
  • Alocasia
  • Colocasia
  • Aristolochia
In which plants, there will be less pollen wasted, no agent required and fertilization is sure to occur. The plants that undergo 
  • Allogamy
  • Homogamy
  • Dichogamy
  • Autogamy
The largest inflorescence of the world is pollinated by ..................
  • Insects
  • Snails and slugs
  • Water
  • Air
Match the Sets.
  List I List II 
 A Intine 1 Microspore mother cell
 B Pollen sac 2 Cellulose
 C Pin-eyed 3 Short-styled
 D Thrum-eyed 4 Long-styled
  • A- 2, B- 1, C- 4, D- 3
  • A- 1, B- 2, C- 4, D- 3
  • A- 3, B- 1, C- 2, D- 3
  • A- 4, B- 1, C- 4, D- 2
Match the two columns.
  List I  List II
 A Mature microspore 1 Exine of pollen grain
 B Sporopollenin 2 Pollen grain
 C Megasporangium 3 Funcile
 D Stalk of ovule 4 Ovule
  • A-2, B-1, C-4, D-3
  • A- 1, B- 2, C- 3, D- 4
  • A-3, B- 4, C- 2, D- 1
  • A- 4, B- 2, C- 3, D- 1
Mark the layer endothecium that is rich in sporopollenin, the resistant protein.
190991_6fce02aca64c4578804d4fb80de9d700.png
  • D
  • B
  • C
  • A
When pollen is transferred from the anther of a flower to the stigma of another flower of the same plant, it is referred to as
  • Allogamy.
  • Xenogamy.
  • Geitonogamy.
  • Autogamy.
In an apomict,
  • More of variations are produced then parent.
  • Fruits produced are larger in size.
  • Seeds can be produced without fertilization.
  • Somatic cells can mix up and form the embryo under natural conditions.
  • Both C and D.
Which one of them cannot exhibit both autogamy and geitonogamy?
  • Castor
  • Maize
  • Papaya
  • Cucumber
In which one of the following pollination is autogamous?
  • Cleistogamy
  • Geitonogamy
  • Xenogamy
  • Chasmogamy
In which of the following is translator mechanism found?
  • Ocimum
  • Pisum
  • Calotropis
  • Yucca
Even in absence of pollinating agents seed-setting is assured in 
  • Salvia
  • Fig
  • Commelina
  • Zostera
The chief pollinators of our agri horticultural crops are .....................
  • Moths
  • Bees
  • Beetles
  • Butterflies
Bees are very important for agriculturists as .................
  • They give bees wax
  • They are agents for pollination
  • Are agents to carry fruits
  • Produce honey
Such kind of structures favour .......... pollination.
192138_035f2862d85b43029fe0cba5bc4c99b0.png
  • Anemophilous
  • Hydrophilous
  • Malacophilous
  • Melittophilous
In Rafflesia, pollination is carried by ..................
  • Ticks and mites
  • Aphids
  • Carrion flies
  • Ants
Sporopollenin, a chemical substance is found in ............................
  • Endothecium of anther
  • Tapetum of anther
  • Intine of pollen grain
  • Exine of pollen grain
Recurrent apomixis involves
  • Generative apospory
  • Somatic apospory
  • Both (A) and (B)
  • None of the above
Which one of the following is an endospermic seed?
  • Pea
  • Bean
  • Gram
  • Castor
What is common feature between vegetative reproduction and apomixis?
  • Both are found in all plant types.
  • Both have progeny identical to the parent.
  • Both are applicable to only dicot plants.
  • Both eliminate the flowering phase.
Study of pollen grain is called as .........................
  • Ethmology
  • Palynology
  • Palaeobotany
  • Omega taxonomy
Components of sexual reproduction of plants include which of the following?
  • Anther
  • Pollen
  • Carpel
  • All of the above
The characteristic feature of family malvaceae is
  • Monadelphous androecium
  • Polyandrous condition
  • Apocarpous gynoecium
  • Polyadelphous androecium
The joint between pedicel and a single stamen of male flower in a cyathium represents 
  • Thalamus
  • Node
  • Internode
  • None of the above
Best example of polyembryony is .................
  • Mangifera
  • Citrus
  • Solanum
  • Cocos
The embryos in sporophytic budding are
  • Diploid
  • Haploid
  • Both (A) and (B)
  • None of the above
The family having flowers with the longest styles is
  • Fabaceae
  • Asteraceae
  • Poaceae
  • Cyperaceae
Horticulturists prefer nucellar adventive embryos because
  • They show high mortality rate.
  • They are pathogen free.
  • They possess fibrous root system.
  • It is easy to be induced by mutations.
Which of the following forms a radicle in a dicot embryo?
  • Epibasal tier of embryo
  • Hypobasal tier of embryo
  • Hypophysis of suspensor
  • Terminal cell of suspensor
The necrohormone theory for the induction of polyembryony was 
proposed by ...............
  • Leroy
  • Haberlandt
  • Maheshwari
  • Winkler
The phenomenon of polyembryony was first observed in .................
  • $$Mangifera$$
  • $$Lillium$$
  • $$Citrus$$
  • $$Euphorbia$$
In monocot embryo, the radicle is produced by ...........
  • Terminal cell
  • Middle cell
  • Epiblast
  • Suspensor

Which is this plant?
214587.gif
  • Cucurbita maxima
  • Lagenaria
  • Ecballium
  • Citrullus
There are at least two families ............... where the product of double fertilization soon disintegrates and endosperm development is completely absent.
  • Orchidaceae and podostemonaceae
  • Asteraceae and fabaceae
  • Poaceae and brassiaceae
  • All above
When synergids and antipodals make the embryo, it is 
  • Apospory
  • Apomixis
  • Amphimixis
  • None of the above
Ovary is half-inferior in the flowers of
  • Cucumber
  • Gauva
  • Plum
  • Brinjal
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