Autogamy can occur in a chasmogamous flower if
pollen matures before maturity of ovule
ovules mature before maturity of pollen
both pollen and ovules mature simultaneously
both anther and stigma are of equal lengths
Choose the correct statement from the following.
Cleistogamous flowers always exhibit autogamy.
Chasmogamous flowers always exhibit geitonogamy.
Cleistogamous flowers exhibit both autogamy and geitonogamy.
Chasmogamous flowers never exhibit autogamy.
A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by
insects
water
wind
animals
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
Monoecious plant bearing unisexual flowers.
Dioecious plant bearing only male or female flowers.
Monoecious plant with bisexual flowers.
Dioecious plant with bisexual flowers.
In a fertilised embryo sac, the haploid, diploid and triploid structure are
synergid, zygote and primary endosperm nucleus
synergid, antipodal and polar nuclei
antipodal, synergid and primary endosperm nucleus
synergid, polar nuclei and zygote