Reproduction in Lower and Higher Plants — Important Questions

Small and inconspicuous flowers, Light and dry pollen grains, Feathery stigma, Large amounts of pollen

Wind-pollinated flowers have adaptations like small size, light pollen, feathery stigma to catch pollen, and produce large amounts of pollen to compensate for wastage. They lack bright colors and fragrance as they don't need to attract insects.

True

Double fertilization involves two fusion events: syngamy (fusion of one male gamete with egg to form zygote) and triple fusion (fusion of second male gamete with secondary nucleus to form primary endosperm nucleus).

Autogamy - Self pollination within the same flower

Autogamy is self pollination, geitonogamy involves same plant but different flowers, xenogamy is true cross pollination between different plants, and cleistogamy occurs in closed flowers.

Unisexuality, Dichogamy, Self incompatibility, Heterostyly

Outbreeding devices prevent self pollination and promote cross pollination. These include unisexuality, dichogamy (different maturation times), self incompatibility, and heterostyly (different levels of anthers and stigma).