Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Water
Bee
Wind
Wind
C.
Wind
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
–120°C
–80°C
–160°C
–196°C
D.
–196°C
Pollen grains can be stored for several years in liquid nitrogen at –196°C (Cryopreservation)
Functional megaspore in an angiosperm develops into
Ovule
Endosperm
Embryo sac
Embryo sac
C.
Embryo sac
Megaspore is the first cell of female gametophytic generation in angiosperm. It undergoes three successive generations of free nuclear mitosis to form 8-nucleated and 7-celled embryo sac.
Double fertilization is
Fusion of two male gametes of a pollen tube with two different eggs
Fusion of one male gamete with two polar nuclei
Syngamy and triple fusion
Fusion of two male gametes with one egg
C.
Syngamy and triple fusion
Double fertilization is a phenomenon that occurs in angiosperms only.
Syngamy + Triple fusion = Double fertilization
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