Multiple Choice QuestionsWith respect to angiosperms, identify the incorrect pair from the following
antipodal - 2n
Vegetative all of male gametophyte - n
Primary endosperm nucleus-3n
Cell of nucellus of ovule -2n
Which one of the following statements is correct?
Hard outer of pollen is called intine
Sporogenous tissue is haploid
ENdothelium produces the microspores
Tapetum nourishes the developing pollen
When pollen tube enters through micropyle, the process is called
Porogamy
Chalazogamy
Mesogarny
Apogamy
Outer wall of pollen grain is made up of
Cellulose
Sporopollenin
Pectocellulose
Lignin
B.
Sporopollenin
A pollen grain contains two-layered cell wall, the outer exine and inner intine. Sporopollenin is found in the exine of pollen grains, which is the most resistant biological material known, of microbial and chemical decomposition. Due to this, pollen grains are well preserved during fossilization. Intine of pollen grain is made up of pectocellulose.
Which of the following floral parts forms pericarp after fertilization?
Nucellus
Outer integument
Ovary wall
Inner integument
Unisexuality of flowers prevents
Autogamy, but not geitonogamy
Both geitonogamy and xenogamy
Geitonogamy, but not xenogam
Autogamy and geitonogamy
Rarely among angiosperms, the pollen grains influenced the endosperm. This is called as
Meta xenia
Nemec phenomenon
Xenia
Mesogamy
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