CBSE Questions for Class 12 Medical Biology Sexual Reproduction In Flowering Plants Quiz 15 - MCQExams.com

Choose the correct answers from the alternatives given.
Cheiropteriphily is the name given to pollination by
  • birds
  • bats
  • insects
  • aquatic animals
The part of the embryo between the cotyledons and the embryonic root (radicle) is caved
  • hypocotyl
  • epicotyl
  • plumule
  • choleorhiza
Callase enzyme which dissolves callose of pollen tetrads to separate four pollens is provided by.
  • Pollens
  • Tapetum
  • Middle layers
  • Enodthecium
In a case of polyembryony, if an embryo develops from the synergid and another from the nucellus, then the synergid embryo is $$\underline{(i)}$$ and nucellar embryo is $$\underline{(ii)}$$.
  • (i) triploid, (ii) haploid
  • (i) diploid, (ii) haploid
  • (i) haploid, (ii) diploid
  • (i) diploid, (ii) triploid
In albuminous seeds, food is stored in ________ and in non-albumious seeds, it is stored in ___________.
  • Endosperm, cotyledons
  • Cotyledons, endosperm
  • Nucellus, cotyledons
  • Endosperm, radicle
Match column I with column II and select the correct option from the given codes.
Column IColumn II
A. Anemophily(i) Grasses, Date palm
B. Hydrophily(ii) Rose, Jasmine
C. Entomophily(iii) Butea, Bignonia
D. Omithophily(iv) Vallisneria, Ceratophylium
  • A-(i), B-(iv), C-(ii), D-(iii)
  • A-(i), B-(iv), C-(iii), D-(ii)
  • A-(ii), B-(iii), C-(i), D-(iv)
  • A-(ii), B-(i), C-(iii), D-(iv)
Endospermic seeds are found in.
  • Castor
  • Barley
  • Coconut
  • All of these
Statement $$1$$: Zygote is the vital link between two generations.
Statement $$2$$: Zygote is formed due to fusion of two haploid gametes.
  • Both statements $$1$$ and $$2$$ are correct
  • Statement $$1$$ is correct but statement $$2$$ is incorrect
  • Statement $$1$$ is incorrect but statement $$2$$ is correct
  • Both statements $$1$$ and $$2$$ are incorrect
Which of the given statements are true?
(i) During the development of a dicot embryo, heart-shaped embryo is followed by globular embryo.
(ii) The part of embryonal axis above the level of cotyledons is epicotyl, while the part below the level of cotyledons is hypocotyl.
(iii) Monocot seeds possess a single cotyledon represented by scutellum.
  • (i) and (ii)
  • (ii) and (iii)
  • (i) and (iii)
  • (i), (ii) and (iii)
The fleshy edible part of an apple is
  • thalamus
  • nucellus
  • ovary
  • endosperm
Transfer of pollen grain from the anther to the stigma of another flower of the same plant is called
  • geitonogamy
  • xenogamy
  • cleistogamy
  • chasmogamy
Intine layer of pollen grain is made up of
  • Inner cellulose, outer pectin
  • Outer cellulose, inner pectin
  • Only with cellulose
  • Only with pectin
The ploidy of aleurone layers is
  • n
  • 2n
  • 3n
  • 4n
How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, Mustard, Groundnut, Radish, Gram, turnip have stamens with different lengths in their flower?
  • Three
  • Five
  • Four
  • Six
The character associated with the plant in which pollination is by Tageticula.
  • Marginal placentation
  • Pentamerous flowers
  • Trilocular ovary
  • Perigynous flowers.
Ubisch bodies found in tapetal cell helps in the formation of 
  • Pollenkitt and pollinia
  • Exine
  • Intine and pollenkitt
  • none of above
Which of the following statements about pollen and pollination is false?
  • Evolution of the pollen grain rejected the need for swimming sperm in flowering plants
  • At maturity, the pollen grain consists of two sperm nuclei and a tube nucleus
  • The pollen tube enters the female gametophyte through the style
  • The pollen grain makes twice the genetic contribution to endosperm cells than it does to the cells of the embryo
Diploid zygote is formed by the fusion of male and female gamete. This process
  • Fertilization
  • Budding
  • Pollination
  • Spore
Match items in column $$I$$ with those in column $$II$$.
Select the correct answer from the following.
(a) Floridean starch(i) Metasequoia
(b) Rhizophore(ii) Cycas
(c) Living fossil(iii) Selaginella
(d) Coralloid root(iv) Rhodophyceae
  • a(ii),b(iii),c(i),d(iv)
  • a(iv),b)(i),c(iii),d(ii)
  • a(iv),b(iii),c(i),d(ii)
  • a(i),b(ii),c(iii),d(iv)
Which of the following statement is correct for pollinated ovary 
  • Nucellus is haploid
  • Antipodal cells are haploid
  • Egg cell is diploid
  • Ovule is haploid
Which one of the following is a true fruit?
  • Apple
  • Pear
  • Cashewnut
  • Coconut
Pollination possible in Carica is?
  • Autogamy
  • Xenogamy
  • Geitonogamy
  • Cleistogamy
Stamen consists of?
  • Filament and anther
  • Style and stigma
  • Filament and pistil
  • Anther and pistil
Which of the following is not concerned with pollination?
  • The falling of pollen grains on the stigma is pollination
  • The pollen grains of one flower do not fall on the same flower
  • The pollen grains of one flower fall on the another flower
  • Pollination helps in fertilization
Identify the incorrect statement.
  • In over $$60$$ percent of angiosperms, pollen grains all shed at $$2$$-celled stage
  • In less than $$40$$ percent species of angiosperms pollination occurs at $$3$$-celled stage of pollen grains
  • Intine of pollen grain is made up of cellulose and pectin
  • Pollen grains of a few species cause severe allergies and bronchial
Epipetalous stamens are seen in
  • Thespesia
  • Datura
  • Male flower of ricinus
  • Ravenala
Study the following structures in the box and find out how many of them are the products of differentiation (A), dedifferentiation (B) and redifferentiation(C).
Cortex, Phelloderm, secondary cortex, secondary phloem, primary medullary rays, interfascicular cambium, phellem, endodermis.
  • A$$=3$$, B$$=1$$, C$$=4$$
  • A$$=2$$, B$$=1$$, C$$=5$$
  • A$$=3$$, B$$=3$$, C$$=2$$
  • A$$=4$$, B$$=3$$, C$$=1$$
The diagram represents enlarged view of an egg apparatus showing entry of pollen tube. Identify labelled structures [A] and [B] of diagram.
1473011_4f4563c97ba349e787e14c47263a1747.PNG
  • [A] Egg nucleus, [B] Male gametes
  • [A] Egg nucleus, [B] Vegetatives nucleus
  • [A] Synergid, [B] Vegetatives nucleus
  • [A] Synergid,[B] Male gametes
Edible part of apple is?
  • Bract
  • Thalamus
  • Cotyledon
  • Endosperm
Persistent nucellus in the seed is known as:
  • Chalaza
  • Perisperm
  • Hilum
  • Tegmen
The spiny seeds with hooks of _______ and ________ get attached to the bodies of animals and are carried to distant places. 
  • Xanthium and Urena
  • Coconut and Mango
  • Xanthium and Mango
  • Coconut and Urena
Choose the correct option.
i) Hydrilla and water lily are pollinated by water.
ii) Water lily and water hyacinth are pollinated by insects or wind.
iii) Water hyacinth and Vallisneria are pollinated by water.
  • i
  • ii
  • iii
  • i, ii, iii
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