Multiple Choice QuestionsPollen grains can be stored for several years in liquid nitrogen having a temperature of
–120°C
–80°C
–160°C
–196°C
Which of the following has proved helpful in preserving pollen as fossils?
Pollenkitt
Cellulosic intine
Sporopollenin
Oil content
With 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
A.
Porogamy
The pollen tube may enter the ovule by following one of three routes given below:
(a) Porogamy Pollen tube enters the ovule through micropyle, e.g., most angiosperms.
(b) Mesogamy Pollen tube enters the ovule through integuments (e.g., Cucurbita) or through funiculus (e.g., Pistacia).
(c) Chalazogamy Pollen tube enters the ovule through chalazal tissues, e.g., Casuarina, Beta vulgaris, Juglens regia, etc.
Which of the following floral parts forms pericarp after fertilization?
Nucellus
Outer integument
Ovary wall
Inner integument
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