CBSE
Multiple Choice Questions
In the given diagram, parts labelled as A, B, C, D, E and F are respectively identified as
Synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
Polar nuclei, egg, antipodals, central cell, filiform apparatus and synergids
Egg, synergids, central cell, filiform apparatus, antipodals and polar nuclei
Central cell, polar nuclei filiform apparatus, antipodals, synergids and egg
Pappus helps in the dispersal of pollen in
Asteraceae
Brassicaceae
Malvaceae
Solanaceae
Compare the statement I and II and choose the correct option.
Statement I In the flowering plants due to higher accumulation of auxins dormancy of lateral buds occurs.
Statement II In Maryland Mammoth (a tobacco variety) flowering occurred at a different time at different latitude due to gibberellins concentration.
Statement I is true, but II is false
Statement I is false, but II is true
Both statements are true
Both statements are false
Unisexuality of flowers prevents
Autogamy, but not geitonogamy
Both geitonogamy and xenogamy
Geitonogamy, but not xenogam
Autogamy and geitonogamy
When two unrelated individuals or lines are crossed, the performance of F1 hybrid in often superior to both of its parents. This phenomenon is called
Transformation
Heterosis
Splicing
Meta Morphosis
An irregular mode of reproduction resulting in the development of an embryo without fertilization is called
(I) parthenogenesis
(II) apogamy
(III) sporophytic budding
Select the correct answer using the code given below.
Only I
Only II
II and III
I, II and III
Which one of the given pollination technique/adaptation is different than others?
Herkogamy
Geitonogamy
Dichogamy
Heterostyly
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
Meta xenia
Nemec phenomenon
Xenia
Mesogamy
The fleshy receptacle of syconus of fig encloses number of
Achenes
Samaras
Berries
Mericarps
The one advantage of cleistogamy is
It leads to greater genetic diversity
Seed dispersal is more efficient and wide spread
seed set is not dependent on pollinators
Each visit of pollinator results in the transfer of hundreds of pollen grains
