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
In an embryo sac, the cells that degenerate after fertilisation are
synergids and primary endosperm cell
synergids and antipodals
antipodals and primary endosperm cell
egg and antipodals
While planning for an artificial hybridisation programme involving dioecious plants, which of the following steps would not be relevant?
Bagging of female flower
Dusting of pollen on stigma
Emasculation
Collection of pollen