Which of the following is NOT a characteristic of a mature pollen grain?
It has a hard outer exine layer
It contains a generative cell and a vegetative cell
It is always binucleate
It is the male gametophyte
Related Questions
Which one forms the endosperm?
antipodal
synergids
secondary nucleus
oospore
Aquatic plant like water-hyacinth and water lily are pollinated by
Water
Air
Insect
Both (b) and (c )
Pollen kit is present in?
anemophily
entomophily
malacophily
zoophily
Chalazal pole is present
Opposite to micropyle
At the origin of integuments
Opposite to nucellus
Near the embryo sac
The fertilization in which male gametes are carried through pollen tube, is known as
Syngamy
Porogamy
Siphonogamy
Chalazogamy
Orthotropous ovule belongs to
Urtica
Polygonum
Peperomea
All of these
Entry of pollen tube with two male gametes and tube nucleus through micropyle, is
Mesogamy
Porogamy
Chalazogamy
None of these
A typical angiosperm embryo sac at maturity is:
8-celled, 7-nucleate
7-celled, 7-nucleate
8-celled, 8-nucleate
7-celled, 8-nucleate
Maturation of gynoecium before anthers of the same flower is?
Protogyny
protandry
heterogamy
autogamy
Chalazogamy is shown by?
petunia
cucurbita
pistacia
casuarina
