CBSE Class 12 Biology Sexual Reproduction in Flowering Plants MCQs Set F

Question: Wind pollination is common in
a) lilies
b) grasses
c) orchids
d) legumes
Answer: b

Question: False fruit is a fruit in which
a) only ovary take part in fruit development
b) only embryo take part in fruit development
c) only chalazal cells take part in fruit development
d) ovary and other floral part are included in fruit development
Answer: d

Question: Attractants and rewards are required for
a) anemophily
b) entomophily
c) hydrophily
d) cleistogamy
Answer: b

Question: Filiform apparatus are
a) special thickenings at antipodal cell
b) special thickenings at micropylar end
c) special thickenings at synergid cells
d) special thickenings at nuclear end
Answer: c

Question: Number of seeds are equal to the
a) number of ovules
b) number of ovaries
c) Both (a) and (b)
d) None of these
Answer: a

Question: Embryo sac is to ovule as …… is to an anther
a) stamen
b) filament
c) pollen grain
d) androecium
Answer: c

Question: Pollen grains can be stored for several years in liquid nitrogen at
a) –196°C
b) –80°C
c) –120°C
d) –160°C
Answer: a

Question: Out of the following choose the post-fertilisation event(s)
a) Endospermogenesis
b) Embryogenesis
c) Both (a) and (b)
d) Megasporogenesis
Answer: c

Question: The edible part of coconut is
a) perisperm
b) cotyledon
c) endosperm
d) pericarp
Answer: c

Question: Which plant shows a close mutualistic relation with a moth?
a) Banana
b) Yucca
c) Hydrilla
d) Viola
Answer: b

Question: Double fertilisation is
a) fusion of two male gametes with one egg
b) fusion of one male gamete with two polar nuclei
c) fusion with two different eggs
d) syngamy and triple fusion
Answer: d

Question: True fruit is directly derived from
a) stem
b) root
c) ovary
d) none of these
Answer: c

Question: Persistent nucellus is known as
a) perisperm
b) hilum
c) tegmen
d) chalaza
Answer: a

Question: The innermost layer of microsporangium is
a) tapetum
b) endothecium
c) middle layer
d) epidermis
Answer: a

Question: Centre of each microsporangium is occupied by
a) sporogenous tissue
b) tapetum
c) central tissue
d) microspore mother cell
Answer: a

Question: A dicot plant bears flowers but no fruits/seeds because
a) only pistillate flowers
b) both types of flowers
c) monoecious plant
d) only staminate flowers
Answer: d

Question: Pollination in water hyacinth & water lily occurs by
a) water
b) insects or wind
c) birds
d) bats
Answer: b

Question: Autogamy occurs in chasmogamous flower if
a) pollen matures before ovule
b) ovule matures before pollen
c) both mature simultaneously
d) anther and stigma equal
Answer: c

Question: Cleistogamous flowers
a) always exhibit autogamy
b) always exhibit geitonogamy
c) exhibit both
d) never exhibit autogamy
Answer: a

Question: Cell division in apomixis is
a) reductional
b) meiosis
c) both
d) mitosis
Answer: d 

Question: Characteristic of wind-pollinated pollens is, they are
a) non-sticky
b) light
c) produced in large number
d) All of the above
Answer: d

Question: Megaspore mother cell is found near the region of
a) micropyle
b) chalaza
c) nucellus
d) integuments
Answer: a

Question: Embryo sac is also called
a) female gamete
b) synergids
c) female gametophyte
d) egg of angiosperm
Answer: c

Question: Exine of pollen is made up of
a) sporopollenin
b) sporogenous tissue
c) spongiform tissue
d) inorganic material
Answer: a

Question: In majority of angiosperms
a) egg has a filiform apparatus
b) there are numerous antipodal cells
c) reduction division occurs in the megaspore mother cells
d) a small central cell is present in the embryo sac
Answer: c

Question: Endosperm is consumed by developing embryo in the seed of
a) pea
b) maize
c) coconut
d) castor
Answer: a

Question: From among the situations below, choose the one that prevents both autogamy and geitonogamy
a) Monoecious plant bearing unisexual flowers
b) Dioecious plant bearing only male or female flowers
c) Monoecious plant with bisexual flowers
d) Dioecious plant with bisexual flowers
Answer: b

Question: Mass of cells enclosed by integuments is called
a) nucellus
b) embryo
c) ova
d) pollen
Answer: a

Question: Functional megaspore in an angiosperm develops into
a) ovule
b) endosperm
c) embryo sac
d) embryo
Answer: c

Question: The process of removal of anther from the flower bud before it dehisces is called
a) emasculation
b) bagging
c) embryo rescue
d) budding
Answer: a

Question: In angiosperms, microsporogenesis and megasporogenesis
a) occur in anther
b) form gametes without further divisions
c) involves meiosis
d) occur in ovule
Answer: c

Question: The cylindrical portion below the cotyledons is …A… that terminates to …B… and its tip is called …C…
A, B and C refer to
a) A–radicle, B–hypocotyl, C–root cap
b) A–root cap, B–radicle, C–hypocotyl
c) A–hypocotyl, B–root cap, C–radicle
d) A–hypocotyl, B–radicle, C–root cap
Answer: d

Question: Coconut water from a tender coconut is
a) immature embryo
b) free-nuclear endosperm
c) innermost layers of seed coat
d) degenerated nucellus
Answer: b

Question: In an embryo sac, the cells that degenerate after fertilisation are
a) synergids and primary endosperm cell
b) synergids and antipodals
c) antipodals and primary endosperm cell
d) egg and antipodals
Answer: b

Question: The most common abiotic pollinating agency in flowering plants is/are
a) water
b) wind
c) Both (a) and (b)
d) None of these
Answer: b

Question: Megasporogenesis is
a) formation of fruits
b) formation of seeds
c) formation of megaspores
d) Both (b) and (c)
Answer: c

Question: Chalazal pole is present
a) opposite to micropyle
b) at the origin of integuments
c) opposite to nucellus
d) near the embryo sac
Answer: a

Question: While planning an artificial hybridisation programme involving dioecious plants, which step is not relevant?
a) Bagging of female flower
b) Dusting pollen on stigma
c) Emasculation
d) Collection of pollen
Answer: c

Question: Vegetative/Asexual reproduction and apomixis are common to each other in
a) type of cell division
b) clone nature of offspring
c) Both (a) and (b)
d) only in dicot plant
Answer: c

Question: Intine is made up of
a) cellulose
b) pectin
c) Both (a) and (b)
d) protein
Answer: c

Question: In which of the following, both autogamy and geitonogamy are prevented?
a) Wheat
b) Papaya
c) Castor
d) Maize
Answer: b

Question: A dioecious flowering plant prevents both
a) autogamy and xenogamy
b) autogamy and geitonogamy
c) geitonogamy and xenogamy
d) cleistogamy and xenogamy
Answer: b

Question: The ability of pistil to recognise and respond to pollen is mainly due to
a) Nucleotides
b) Proteins
c) Minerals
d) Lipid or Inulin
Answer: b

Question: In embryos of a typical dicot and a grass, true homologous structures are
a) coleorhiza and coleoptile
b) coleoptile and scutellum
c) cotyledons and scutellum
d) hypocotyl and radicle
Answer: c