CBSE
Multiple Choice QuestionsEndosperm of gymnosperms is
Haploid
Tetraploid
Diploid
None of these
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
Winged pollen grains are present in
Mustard
Cycas
Pinus
Mango
Offsets are produced by
Meiotic divisions
Mitotic divisions
Parthenogenesis
Parthenocarpy
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
Which of the following floral parts forms pericarp after fertilization?
Nucellus
Outer integument
Ovary wall
Inner integument
Which of the following has proved helpful in preserving pollen as fossils?
Pollenkitt
Cellulosic intine
Sporopollenin
Oil content
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
–120°C
–80°C
–160°C
–196°C
Outer wall of pollen grain is made up of
Cellulose
Sporopollenin
Pectocellulose
Lignin
