Question

What is the advabtage of large stamens with Long filaments that hang outisde the flower

Answer 1

Here is your answerTransfer of pollen grains from anther to stigma of a flower

Types of pollination
• Self pollination takes place when mature pollen grains of a flower fall on the stigma of the same flower
• Cross pollination takes place when pollen grains of a flower fall on the stigma of another flower of the same species

Advantages of pollination
• Healthy offspring
• Leads to variation
• Greater chances of dispersal

Agents of pollination
• Wind
• Insects

Adaptations of flowers to wind and insect pollination

Insect pollinated flowers (entomophilus)
• Are scented to attract insects
• Have stick stigma for pollen grains to stick on
• Are brightly coloured to attract insects
• Presence of nectar to attract insects
• Have nectar guides to guide insects to the nectarines
• Have nectarines to secrete nectar
• Stigma/ anthers located inside the flower/tubal/funnel shaped corolla to increase chances of contact by insects
• Sticky/spiny/spiky pollen grains which stick on the body of insects and on stigma
• Large/conspicuous flowers easily seen by/attract insects
• Anthers firmly attached to the filament for insects to brush against them
• Landing platform to ensure contact with anthers and stigma
• Mimicry to attract (male) insects.



Wind pollinated flower (anemophilus)
• Anthers/stigma hang outside the flower to increase chances of pollination
• The style/filament is long to expose stigma/anthers
• Stigma is hairy/feathery/branched to increase surface area over which pollen grains land/to trap pollen grains
• Pollen grains are smooth/dry/light/small to be easily carried by wind
• Large amount of pollen grains to increase chances of pollination
• Anthers loosely attached to filaments to enable them to sway to release pollen grains
• Pollen grains may have structures which contain air to increase buoyancy
• Flowers have long stalks holding them out in the wind


Ways in which plants prevent(Hinder) self-pollination
• Protandry(anthers/stamens mature first)
• Protagyny (pistils mature first) 
• Monoecism (where male and female parts are on same plant but different parts)
• Dioecism(where male and female parts are on different plants)
• Incompatibility (self sterility)
• Heterostyly (styles at different heights)

Characteristics that ensure cross pollination takes place in flowering plants
• Presence of special structures that attract agents of pollination
• Protandry/dichogamy
• Protagyny/dichogamy
• Monoecism
• Self sterility
• Heterostyly

Advantages of cross pollination
• hybrid vigour
• less prone to diseases
• promotes genetic variation
• greater evolutionary potential

Hope it helps and mark it brainliest

Answer 2

Answer:

That's only for increasing the chances of pollination.

If the stamens will be long and the anthers will hang out of the flower,

the anthers will be easily obtained or catched by the insects for cross pollination.

It is also for the winds that the anthers will be easily disposed by the strong winds so that the anthers will be pollinated by the wind to the stigma.